HackRF One 1MHz to 6GHz Radio Platform Development Board (Banggood, Aliexpress: Hi-Speed USB 2.0, USB-powered, Software-controlled antenna port power (50 mA at 3.3 V), SMA female clock input and output for synchronization, Half-duplex transceiver, 1MHz to 6 GHz operating frequency, Convenient buttons for programming, Open-source hardware, Compatible with GNU Radio / SDR# / and more, Software-configurable RX and TX gain and baseband filter, SMA female antenna connector, Up to 20 million samples per second, Internal pin headers for expansion, 8-bit quadrature samples (8-bit I and 8-bit Q) (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
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.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($211.35): BG00c906
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): 7bcdf9, Terence, Tabby20, 2203ActiesNL, BG1efeb0, MVC8SPRING, 8BGwbg2204
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for HackRF One 1MHz to 6GHz Radio Platform Development Board. The lowest price was: $149.99.
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)).