Doing so is against international law.
eBay
U/V UHF VHF Dual Band Spectrum Analyzer Simple Spectrum Analyzer with W/Tracking Source 136-173MHz /
Aliexpress UK
UNIT IS IN USED CONDITION. TESTED & WORKING. EXCELLENT HIGH QUALITY GRAPHIC EQUALIZER WITH DIGITAL DISPLAY. AMAZING SOUND. GOOD WORKING ORDER. COOL DIGITAL DISPLAY. TONNES OF FUNCTIONALITY. CONSULT PHOTOS FOR EXACT ITEM YOU WILL RECEIVE.
eBay
Quansheng TK11 Two Way Radio USB C Multi-Bands AM SSB FM NOAA 10W Spectrum Analyzer Magic Voice
Aliexpress UK
Pioneer GR-555 Graphic Equalizer Spectrum Analyzer 7 Band The item is used to have the general wear of a used item but overall is in good condition. Please note that one of the ends of one of the sliders is slightly broken off, but there is enough of it there to still be able to grip to slide it. This is on the last slider on the very right as seen in the zoomed in photo, the last photo.
eBay
New Handheld Tiny Spectrum Analyzer 100k-5.3GHz RF Signal Generator with 4inch Display for tinySA
Aliexpress UK
TELEVES MTD 50AERIAL AND SATELLITE TV SPECTRUM ANALYSER DIGITAL ANALOG TV METER Only used a few times and kept as a spare so in great condition The case and test meter are practically unmarked Needs a battery as the current one does not hold a charge A battery can be purchased for around £18 FREE POSTAGE Will be very well packaged and sent recorded delivery
eBay
Quansheng TK11(5) HAM Transceiver Multi-Bands AM SSB FM NOAA 10W Spectrum Analyzer Magic Voice Taiko
Aliexpress UK
Spectrum Analyser, I bought it second-hand a month ago to check industrial remote. It did great job - I was able to verify all 10 channels at 432MHz and narrow down the problem to antenna base - not the remote itself.
eBay
Quansheng TK11 (5) Walkie Talkie Magic Voice Spectrum Analyzer Frequency Meter AM FM SSB Dual
Aliexpress UK
HP 8562E Spectrum Analyzer 30Hz - 13.2 GHz. Item powers up unable to test as we do not have the knowledge to.
eBay
Quansheng TK11(8) Walkie Talkie 10W 3000mAh VHF UHF Dual Receive AM FM CW SSB NOAA Spectrum Analyzer
Aliexpress UK
Last photo shows the noise floor with the input shorted. No other accessories or cables are included in the sale. 400 line display 1024 point FFT or 800 line display 2048 point FFT. 40 point harmonic analysis with total harmonic distortion calculation.
eBay
Quansheng TK11(8) Walkie Talkie 10W 3000mAh VHF UHF Dual Receive AM FM CW SSB NOAA Spectrum Analyzer
Aliexpress UK
EQ bypass: bypass the graphic equalizer in the signal path. 1 x Audio Equalizer. Power consumption: 30W. Input and output interfaces support multiple types: TRS 6.35/RCA/XLR balanced interface. Line input impedance: 15KΩ.
eBay
Quansheng TK11(8) Walkie Talkie 10W 3000mAh VHF UHF Dual Receive AM FM CW SSB NOAA Spectrum Analyzer
Aliexpress UK