Latest update shows that TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer costs $149.99 (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
tinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer with 4 inch TFT Display High Frequency Output Signal
Latest coupon code price check (UTC time):
Banggood ($149.99)
Banggood warehouse is located in China. Coupons for TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer? Nope, there’re no coupons in Banggood. Isn’t it too expensive? Hmmm, price is higher than average (which is $139.99 right now), so better set price alert down below…
Link: Banggood product page
Price: $149.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGf9c700, BGESJY8, BGcabee2
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for TinySA ULTRA 100k-5.3GHz Handheld Spectrum Analyzer is here.
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)).