$139.99 – TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer (Banggood, Aliexpress: tinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer with 4 inch TFT Display High Frequency Output Signal (the best price with coupon)).
When I was updating this page, then coupon price was $139.99 for TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($139.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Price? From what I can see this price is higher than average price ($135.33).
Link: Banggood product page
Price: $139.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGf9c700, BGESJY8, BGcabee2, BG0f80e6
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer. The lowest price was: $126.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).