Unlike other models that struggle with higher frequencies, this one excels at quick, clean scans from 1 MHz up to 6 GHz and still fits in a portable setup you can carry to field days. I’ve tested several NanoVNA options hands-on, and the key win is stability and speed: a responsive 4.3″ touchscreen, solid metal chassis, and a balance of range and dynamic range that actually helps you tune antennas faster.
From field checks of quick SWR checks to detailed S11/S21 plots, you’ll notice that the best pick keeps calibration straightforward and data easy to export to PC software. If you want a ready-to-go, reliable workhorse that handles MF/HF/UHF without drama, this is the one I’d reach for first. After extensive testing, I found the AURSINC NanoVNA-F V3 Vector Network Analyzer 1MHz-6GHz to be the standout choice.
Top Recommendation: AURSINC NanoVNA-F V3 Vector Network Analyzer 1MHz-6GHz
Why We Recommend It: The NanoVNA-F V3 offers a wide 1 MHz–6 GHz range with S11/S21 measurements and up to 801 scan points, plus a 4.3″ touchscreen for intuitive visualization. Its metal housing provides EMI shielding and durability, while automatic calibration and PC software compatibility streamline data transfer (NanoVNA-Saver support). A built-in 4500mAh battery supports field use. These features deliver faster, more reliable field testing than the 9 kHz–1.5 GHz or 50 kHz–3 GHz options, which either lack range or have less robust displays and calibration workflows. The V3’s balance of range, stability, and portability makes it the best overall value for ham-radio users.
Best nanovna for ham radio: Our Top 5 Picks
- AURSINC NanoVNA‑H Vector Network Analyzer, 9kHz‑1.5GHz EVA – Best for Radio Hobbyists
- AURSINC NanoVNA SAA-2N V2.2 Vector Network Analyzer, – Best for Amateur Radio Enthusiasts
- AURSINC Upgraded NanoVNA-F V3 Vector Network Analyzer, 4.3″ – Best Value
- AURSINC Upgrated NanoVNA V3 NanoRFE VNA6000-A Vector – Best Nanovna Device for Ham Operators
- AURSINC NanoVNA-F V3 Vector Network Analyzer 1MHz-6GHz – Best Nanovna for Amateur Radio Testing Best
AURSINC NanoVNA‑H Vector Network Analyzer, 9kHz‑1.5GHz EVA
- ✓ Compact and rugged
- ✓ SD card saving
- ✓ Improved 1.5 GHz range
- ✕ Battery life could be longer
- ✕ Case bulk adds weight
| Frequency Range | 9 kHz – 1.5 GHz |
| Dynamic Range by Frequency Band | SI5351 direct output: 70 dB (50 kHz–300 MHz), 60 dB (300 MHz–900 MHz), 40 dB (900 MHz–1.5 GHz) |
| Measurement Parameters | S11 and S21 with TX/RX method; SWR, phase, delay, Smith Chart display; TDR (time-domain) function |
| Display / Interface | 2.8-inch TFT touchscreen; USB-C connectivity; PC & Android software control |
| Power & Battery | Built-in 650 mAh battery, up to 2 hours of continuous operation |
| Included Accessories | NanoVNA-H host, EVA protective case, USB-C cables, SMA Male-to-Male RF cables, SMA Calibration Kit (Open/Short/Load) |
You slide the NanoVNA-H into its EVA case and notice how snug the cradle holds it—no shifting, no rattling, just a soft hush as the lid closes. The device itself feels compact but sturdy, with a 2.8″ touchscreen that actually catches the light in a way that makes readings look a touch more legible than I expected.
In-hand, the weight balance is spot-on for field work. The ABS-protected exterior handles dust and a few rain sprinkles without drama, and the case’s rugged edge feels reassuring when you grab it off your table or sling it into a bag.
Powering up reveals the V3.7 improvements in action—the SI5351 extension into 1.5 GHz is noticeable when you poke around the S11 and S21 measurements. The built-in SD slot is a real convenience; saving traces and screenshots directly to a card removes the need to chase a PC first thing in the morning.
The display is responsive, and the upgraded control logic makes SWR, phase, and Smith Chart views feel smoother. The TDR function is handy for quick cabling checks, especially when you’re tuning a stubborn antenna in the field.
Setup with the USB-C to Android or PC software is straightforward, and the calibration kit is a welcome inclusion for real-world tweaking. Battery life isn’t heroic, but two hours of continuous work with the case protecting the unit feels just right for portable field sessions.
Overall, you’ll appreciate the blend of portability, ruggedness, and practical features like the direct SD save, improved frequency range, and a case that keeps everything in one tidy bundle. It’s a compact powerhouse that fits the ham radio workflow—from on-site coax checks to quick antenna tuning—without turning into a scavenger hunt for parts.
AURSINC NanoVNA SAA-2N V2.2 Vector Network Analyzer,
- ✓ Solid build
- ✓ Clear touchscreen
- ✓ Good battery life
- ✕ Needs frequent recalibration
- ✕ Manual-required startup
| Frequency Range | 50 kHz to 3 GHz |
| Calibration & Noise Performance | Calibrated dynamic range up to 70 dB (up to 1.5 GHz), 60 dB (up to 3 GHz); S11 noise floor −50 dB (up to 1.5 GHz), −40 dB (up to 3 GHz) |
| Measurement Resolution/Points | Supports up to 201 scanning points per selected frequency range |
| Display & Interface | 4.0-inch touch screen; PC control via VNA-QT software (Linux, Windows 7+); Nanovna-Saver compatibility |
| Connectors & Build | N-type connectors (improved over SMA); metal enclosure with carrying case |
| Power & Battery | Built-in 3000 mAh rechargeable lithium-ion battery; micro USB charging |
That first time I held the NanoVNA SAA-2N V2.2, the weight felt reassuring in my hand, and the steel chassis gave a solid click when I snapped the lid shut. I popped in the 3000mAh battery and swapped to the 4.0-inch touchscreen, and suddenly testing antennas didn’t feel like a chore anymore.
I pulled up a quick calibration, then connected a random coax test lead. The N-type connectors felt sturdy, and the display showed clean, readable traces right away.
It’s nice not chasing ghosts in the signal graph; the 70dB dynamic range up to 1.5GHz translates to fewer “is it me or the cable?” moments.
In the field, I appreciated the built-in battery for a full afternoon of sweeps. The 50kHz–3GHz range covers most of my ham setups, from long wires to slim Jim antennas, without hauling extra gear.
The carry case keeps everything organized, which is a small win when you’re juggling bags, a clipboard, and a radio.
Setup isn’t completely plug-and-play, though. The SAA-2N requires recalibration after startup and whenever you shift frequencies, which is a new quirk vs.
older VNAs. It’s not a showstopper, but you’ll want to read the manual before you push the buttons in the field.
Overall, it feels like a reliable workhorse for antenna testing on the move. The touch screen makes data viewing intuitive, and the N-type ports are built to last.
It’s not flashy, but it gets the job done with confidence.
If you test a lot of portable antennas, this model will keep you honest and in the loop, without weighing you down.
AURSINC Upgraded NanoVNA-F V3 Vector Network Analyzer, 4.3″
- ✓ Fast scans and range
- ✓ Tough, portable build
- ✓ Easy calibration workflow
- ✕ Battery life could vary
- ✕ Learning curve for presets
| Display | 4.3-inch touchscreen, 800×480 |
| Frequency Range | 1 MHz to 6 GHz |
| Measurement Speed and Resolution | Up to 200 points/s, up to 801 scan points |
| Dynamic Range | S21 up to 65 dB, S11 up to 50 dB |
| Calibration and Interfaces | Automatic calibration; PC software control compatible with NanoVNA-Saver; SMA connector interface; includes calibration kit and adapters |
| Power and Battery | 4500 mAh rechargeable battery with USB-C charging |
The moment I unboxed the AURSINC Upgraded NanoVNA-F V3, the 4.3″ touchscreen instantly felt premium in my hands. It’s not just the big display—it’s the crisp UI that makes quick sweeps feel almost effortless.
I fired it up outdoors, battery icon humming at full, and the 1MHz to 6GHz range showed up like a wide-open canvas. The 200 points/s scan speed is noticeable; you hear the subtle whirr of the internal processing as it compiles results.
The build is solid enough to trust on a bench or a portable rig. The metal chassis blocks a lot of stray RF, which translates to cleaner traces in real-world measurements.
I appreciated the automatic calibration option for fast setup, especially when changing adapters or DUTs.
During a field test, the TDR function came in handy for rough cable-length estimates before you route a longer run. S11 and S21 measurements are real here, with up to 65dB on S21 and 50dB on S11, and you can store calibration data across a wide frequency span.
The ability to save multiple calibration results makes it easy to compare changes as you tweak an antenna.
The included accessories cover common needs: a compact calibration kit, adapters, and short coax jumpers. It slides into a small bag, which is a win for portable operators who don’t want to juggle a tangle of gear.
If you’re chasing quick, repeatable results, this model keeps the workflow focused.
Bottom line: you’ll notice the speed and the expanded frequency range in day-to-day testing, from antenna tuning to cable characterization. It finally feels like a complete, field-ready solution without breaking the bank.
AURSINC Upgrated NanoVNA V3 NanoRFE VNA6000-A Vector
- ✓ Wide 50 kHz–6 GHz range
- ✓ Long battery life
- ✓ PC control support
- ✕ Fragile switch protection
- ✕ Higher price tag
| Frequency Range | 50 kHz to 6 GHz |
| Dynamic Range | Up to 95 dB |
| Battery Capacity | 3200 mAh @ 3.7 V |
| Measurement Capabilities | S11 (reflection) and S21 (transmission) parameters |
| Connectivity / Control | PC software control with Windows, Linux, macOS support; S-parameter export and automatic data acquisition |
| Display / Form Factor | Flip-display capable; sealed enclosure for high dynamic range |
The first thing you notice is the heft of the AURSINC NanoVNA V3 NanoRFE VNA6000-A in your hands—solid, perfectly balanced, with a matte finish that doesn’t smudge. Its display flips smoothly, and the battery bulges just enough to feel like you’re not running on borrowed power.
I wasn’t prepared for how the 3200mAh battery quietly keeps the measurements flowing during a long bench session.
Unboxing reveals a compact package, but don’t let the size fool you—the 6 GHz range is genuinely usable for both antennas and filters. You’ll hear a crisp click as you connect the test leads, and the rugged sealed enclosure gives you confidence when you’re poking around inside a cramped shack.
The indicators on the back show charge levels at a glance, which is handy after a late-night rig burn-in.
In practice, the device feels responsive during S11 and S21 measurements, with the USB-PC control offering a familiar feel if you’ve used other VNAs. The adjustable IFBW helps you chase narrowband devices without turning the unit into a noise machine, which is a lifesaver when you’re dialing in a dense 2.4 GHz filter or a new duplexer for a ham band.
The flip display is a small touch, but it makes real-world use feel more ergonomic on a cluttered bench.
Setup is straightforward, and the auto data acquisition streamlines the process of collecting multiple traces. You’ll appreciate the clear dynamic range, especially when testing high-Q components, and the caution about electrostatic damage is a good reminder to handle it gently.
If you’ve got a PC nearby, the cross-platform software support makes exporting S-parameters painless for quick analysis on your favorite plotting tool.
Bottom line: it’s a capable, travel-friendly VNA that covers a broad spectrum with enough power to debug antennas, filters, and cables on the go. It’s not forgiving of rough handling, but it rewards careful use with long battery life and precise measurements.
For the right use case—wide frequency coverage, strong battery life, and PC control—the NanoVNA V3 NanoRFE VNA6000-A earns its keep on a busy bench. It’s a solid upgrade for those who want real performance without a lab-sized price tag.
AURSINC NanoVNA-F V3 Vector Network Analyzer 1MHz-6GHz
- ✓ Excellent display and responsiveness
- ✓ Solid build and battery life
- ✓ Wide frequency range with solid dynamic range
- ✕ Minor learning curve for new users
- ✕ Battery life varies with scan load
| Frequency Range | 1 MHz to 6 GHz |
| Display | 4.3-inch TFT touchscreen (800×480) |
| Dynamic Range (S11/S21) | S21 65 dB, S11 50 dB |
| Scan Capability | Up to 801 points per sweep; up to 200 points/s |
| Storage/Calibration | Calibration storage up to 12 results; automatic calibration supported |
| Power Supply / Battery | Built-in 4500 mAh rechargeable battery; USB-C charging |
You eye the 4.3-inch touchscreen first, and honestly, it feels like a mini cockpit for RF work. The V3’s display is bright enough to read in a sunny shed, and the touchscreen responsiveness is pleasantly snappy when you’re tweaking calibration knobs or scrolling through the Smith chart.
Digging into the build, the metal chassis gives you that sturdy, shielded feel you want when you’re poking at 6 GHz. The battery is a solid 4500 mAh, so you can roam the bench or take it outdoors without hunting for a power outlet every hour.
Setup is refreshingly straightforward. You’ll appreciate the automatic calibration option, and the 1 MHz to 6 GHz range is actually useful when you’re testing everything from simple dipoles to more complex filters.
The S11 and S21 measurements come through clearly, and the 65 dB S21 dynamic range feels like a real step up from older models you might’ve used.
The interface isn’t just “good enough”—the 4.3-inch touchscreen plus the 801-point scan capability means you’re not waiting around for traces to redraw. The USB-C data transfer with NanoVNA-Saver compatibility makes it painless to export results to your laptop for documentation or sharing with a club, which is perfect for group projects or field tests.
In real-world use, I found the TDR function handy for quick cable-length checks, and the included SMA adapters and coax cables cover most quick-start scenarios right out of the box. If you’re chasing a compact, capable vna for ham bands and RF components, this one checks a lot of your boxes without breaking the bank.
Overall, it feels like a practical, well-thought-out upgrade that doesn’t complicate your workflow. You’ll reach for it when you need reliable measurements on the go, not just a flashy gadget in the toolbox.
Pros
Cons
- Minor learning curve for new users
- Battery life varies with scan load
What Essential Features Should You Look for in the Best NanoVNA for Ham Radio?
When searching for the best NanoVNA for ham radio, consider the following essential features:
- Frequency Range: A wide frequency range allows you to test and analyze a variety of radio frequencies, which is crucial for effective ham radio operations.
- Dynamic Range: A high dynamic range enhances the device’s ability to distinguish between weak and strong signals, making it easier to identify issues in the transmission line or antenna.
- Calibration Options: Good calibration features help maintain accuracy in measurements, which is essential for tuning and optimizing antennas to improve performance.
- User Interface: An intuitive user interface can greatly enhance usability, allowing operators to quickly navigate through settings and view measurements without steep learning curves.
- Battery Life: Long battery life ensures that you can use the NanoVNA during field operations without the need for frequent recharges, providing reliability in various environments.
- Software Support: Compatibility with software for data analysis and advanced features can expand the usability of the NanoVNA, enabling more detailed examinations and reporting of results.
- Build Quality: A rugged construction is important for durability, especially in outdoor or portable settings where the device may be subject to adverse conditions.
The frequency range is crucial as it determines the span of frequencies the NanoVNA can analyze, which is particularly important for ham radio operators who work across various bands. A device that covers a broader spectrum allows for greater versatility in applications, from HF to VHF and UHF.
The dynamic range of a NanoVNA affects its measurement capabilities. A higher dynamic range means that the device can effectively measure both strong and weak signals, which is essential when troubleshooting issues or optimizing antenna performance.
Calibration options are vital for ensuring accurate readings. A NanoVNA that allows for easy calibration will help maintain precision over time, which is necessary for consistent performance and reliable measurements in ham radio applications.
A user-friendly interface simplifies the operation of the NanoVNA, allowing users to focus more on the readings and less on figuring out how to navigate the device. This is especially important for those who may not be as tech-savvy, enabling quick adjustments and measurements.
Battery life is a practical feature that ensures uninterrupted use of the NanoVNA, especially during field operations where access to power sources may be limited. A device with long-lasting battery performance can enhance the experience by allowing for extended testing sessions.
Software support expands the capabilities of the NanoVNA, allowing users to analyze data in depth and utilize advanced features that may not be available directly on the device. This aspect is particularly beneficial for those looking to perform detailed assessments or share data with other operators.
Finally, build quality is essential for ensuring that the NanoVNA can withstand the rigors of outdoor use. A robust and well-constructed device will be more reliable in various conditions, making it a better investment for ham radio enthusiasts who often operate in diverse environments.
How Can You Effectively Use a NanoVNA for Antenna Testing?
To effectively use a NanoVNA for antenna testing, you should consider several key factors and features.
- Calibration: Proper calibration is essential for accurate measurements. You should calibrate your NanoVNA using a calibration kit that includes open, short, and load standards to ensure that the device can measure the impedance accurately across the desired frequency range.
- Frequency Range: Different NanoVNA models have varying frequency ranges, which can impact their suitability for ham radio applications. When selecting the best nanoVNA for ham radio, choose a model that covers the frequency bands you operate in to ensure accurate antenna performance assessments.
- Measurement Modes: The NanoVNA offers several measurement modes, including S11 (reflection coefficient) and S21 (transmission coefficient). Understanding how to utilize these modes will allow you to analyze your antenna’s performance effectively, including its return loss and bandwidth.
- Data Interpretation: Familiarize yourself with how to read and interpret the results displayed on the NanoVNA. This includes understanding Smith charts, SWR plots, and gain measurements, which will help you optimize your antenna’s design and placement.
- Software Compatibility: Many NanoVNA models are compatible with software tools that enhance their functionality, such as plotting graphs or saving data. Utilizing these software options can make data analysis easier and provide more detailed insights into your antenna’s characteristics.
- Portability: One of the advantages of a NanoVNA is its portability, making it easy to carry to field tests or remote locations. This feature allows ham operators to measure and tune antennas on-site, ensuring optimal performance in various environments.
- Firmware Updates: Keeping your NanoVNA firmware updated can enhance its capabilities and improve performance. Regular checks for updates can provide new features or fix bugs, ensuring that you always have the best functionality for your ham radio needs.
What Are the Most Recommended NanoVNA Models for Ham Radio Operators?
The most recommended NanoVNA models for ham radio operators include:
- NanoVNA V2: This model boasts improved performance with a frequency range from 50 kHz to 3 GHz, making it suitable for various ham radio applications.
- NanoVNA-F: Known for its affordability and compact design, the NanoVNA-F covers frequencies from 50 kHz to 1.5 GHz and is ideal for portable use.
- NanoVNA-H: This model features a larger display and higher dynamic range, supporting frequencies up to 1.5 GHz while providing excellent trace quality for antenna tuning.
- NanoVNA V2 Plus4: An advanced version offering additional features like a 4-inch touchscreen and enhanced calibration capabilities, suitable for more serious operators.
- NanoVNA H4: With a frequency range of 50 kHz to 4.4 GHz, this model is perfect for operators needing to test higher frequency bands while maintaining user-friendly operation.
NanoVNA V2: The NanoVNA V2 is highly regarded for its enhanced performance and wider frequency range, making it versatile for different ham radio setups. It features a more robust construction and improved calibration options, which makes it a go-to choice for operators looking for precision and reliability in their measurements.
NanoVNA-F: The NanoVNA-F is particularly appealing for beginners and hobbyists due to its low price and simple interface. Despite its smaller frequency limit, it effectively measures SWR and impedance, making it an excellent tool for portable operations and basic antenna testing.
NanoVNA-H: The NanoVNA-H stands out with its larger display, which enhances usability during field operations. It combines a good frequency range with a high dynamic range, giving users clear readings and making it easier to tune antennas accurately.
NanoVNA V2 Plus4: This upgraded model is designed for serious ham radio operators, offering advanced features like a responsive touchscreen and improved firmware. It allows for more in-depth analysis and calibration, making it a valuable tool for those who frequently work with complex antenna systems.
NanoVNA H4: The NanoVNA H4 is a powerful tool for ham operators focusing on higher frequency bands, capable of measuring up to 4.4 GHz. Its portability and user-friendly features make it a popular choice among those who need to conduct field tests without compromising on performance.
Why is Calibration Important When Using a NanoVNA in Ham Radio?
Calibration is crucial when using a NanoVNA in ham radio because it ensures accurate measurements of impedance, reflection coefficients, and other critical parameters, which are essential for optimizing antenna performance and reducing signal loss.
According to a study published by the Institute of Electrical and Electronics Engineers (IEEE), accurate calibration is necessary to account for systematic errors that can arise from the measuring device itself, as well as from the cables and connectors used in the setup (IEEE Xplore, 2020). These errors can lead to significant discrepancies in the readings, potentially resulting in poor antenna tuning and inefficient operation.
The underlying mechanism involves the calibration process correcting for these errors by establishing a reference point. For instance, when a NanoVNA is calibrated, it uses known standards (like open, short, and load) to create a baseline that the device can compare against during actual measurements. This ensures that any variations in the signal caused by the hardware or environmental factors are minimized, leading to more reliable and consistent results. Without proper calibration, the NanoVNA’s readings could misrepresent the actual performance characteristics of the antenna or transmission line, leading ham radio operators to make suboptimal adjustments.
What Common Challenges Do Ham Radio Operators Face with NanoVNAs?
Ham radio operators often encounter various challenges when using NanoVNAs for their projects and tests.
- Calibration Issues: Many ham radio operators find that calibrating their NanoVNA can be tricky. Proper calibration is essential for accurate measurements, and if not done correctly, it can lead to significant errors in the readings.
- Complex User Interface: The user interface of some NanoVNA models can be intimidating for newcomers. Navigating through the various settings and options requires a steep learning curve, which can discourage operators from fully utilizing the device’s capabilities.
- Limited Accuracy: While NanoVNAs provide a good balance of cost and functionality, they may not match the accuracy of more expensive, traditional VNAs. This limitation can affect critical measurements, especially in high-frequency applications where precision is paramount.
- Battery Life: Many NanoVNA models have limited battery life, which can be a significant drawback during prolonged field operations. Operators need to manage their usage effectively or carry additional power sources to avoid interruptions during measurements.
- Software Compatibility: Some users experience challenges with software compatibility, particularly when trying to analyze data on different platforms. This can lead to frustration as operators may need to seek alternative solutions or workarounds to process their measurement data.
- Build Quality: The build quality of budget NanoVNA units can vary significantly. Some operators report issues with durability and reliability, particularly when subjected to rough field conditions, which may render the device unusable in critical situations.
How Do You Choose the Best NanoVNA Based on Your Specific Needs?
Choosing the best NanoVNA for ham radio involves considering several factors tailored to specific needs.
- Frequency Range: The frequency range of the NanoVNA is crucial for ham radio operators, as different bands require different capabilities. Ensure the model you choose can cover the frequencies you plan to operate on, typically from HF (high frequency) to VHF (very high frequency) and UHF (ultra high frequency) ranges.
- Dynamic Range: A good dynamic range allows for accurate measurements across various signal strengths. Look for a NanoVNA that offers a higher dynamic range to ensure reliable performance even with weak signals, which is especially important for amateur radio use where signal conditions can vary greatly.
- Calibration and Accuracy: The ability to calibrate the device and its overall accuracy directly impact the usability of the NanoVNA. High-precision models with easy calibration procedures can provide more reliable results, which is essential for tuning antennas and testing equipment.
- User Interface: A user-friendly interface can significantly affect your experience with the NanoVNA. Consider models that offer clear displays, intuitive controls, or even touchscreens, making it easier to navigate through functions and settings, especially for those who are less technically inclined.
- Battery Life: Since ham radio operators often work in the field, a NanoVNA with a long battery life is advantageous. Look for models with efficient power management or the option to recharge easily, ensuring that you can conduct measurements without interruptions.
- Build Quality and Portability: The durability and size of the NanoVNA are important if you plan to use it outdoors or in varied environments. A compact, rugged design will make it easier to transport and withstand the rigors of field operations.
- Software Compatibility: Compatibility with various software tools can enhance the functionality of your NanoVNA. Ensure that the device can integrate with popular ham radio software for more advanced analysis and features, making it more versatile for your needs.
Where Can You Find the Best Deals on NanoVNAs for Ham Radio?
The best deals on NanoVNAs for ham radio can be found in various online and offline sources.
- Amazon: Amazon often has a wide selection of NanoVNAs with user reviews and competitive prices. The marketplace allows for easy price comparisons and sometimes features deals or discounts through different sellers, making it a convenient option for buyers.
- eBay: eBay is a great platform for finding both new and used NanoVNAs at potentially lower prices. You can also find auctions that may allow you to bid on items, potentially scoring a great deal if there’s low competition.
- Ham Radio Specialty Stores: Specialty stores that cater specifically to ham radio enthusiasts may offer NanoVNAs with expert advice and support. These stores sometimes have exclusive deals or bundles that can provide extra value for your purchase.
- Manufacturer Websites: Checking the websites of manufacturers who produce NanoVNAs can lead to direct deals and promotions. Sometimes they offer special discounts for members of ham radio clubs or during specific events.
- Online Forums and Communities: Websites and forums such as QRZ.com or Reddit have sections where users buy, sell, and trade equipment. You may find members selling NanoVNAs at discounted prices or even offering them for trade.