$158.99 – TinySA ULTRA Plus ZS406 Handheld Spectrum Analyzer 900MHz-5.4GHz 20dB LNA Module 3.98 inch IPS-TFT LCD 5000mAh Battery Portable Analyzer – Black.
Latest update shows that TinySA ULTRA Plus ZS406 Handheld Spectrum Analyzer 900MHz-5.4GHz 20dB costs $158.99 (in Banggood). Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood ($158.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $140.66)
Link: Banggood product page
Price: $158.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG109d6e
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Price history (for all/most countries) for TinySA ULTRA Plus ZS406 Handheld Spectrum Analyzer 900MHz-5.4GHz 20dB is here. The lowest price was: $135.99.
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)).