Software-configurable RX and TX gain and baseband filter, 1MHz to 6 GHz operating frequency, Open-source hardware, Software-controlled antenna port power (50 mA at 3.3 V), Hi-Speed USB 2.0, SMA female antenna connector, Compatible with GNU Radio / SDR# / and more, Up to 20 million samples per second, 8-bit quadrature samples (8-bit I and 8-bit Q), SMA female clock input and output for synchronization, Convenient buttons for programming, Internal pin headers for expansion, Half-duplex transceiver, USB-powered.
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Aliexpress
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Banggood
Banggood warehouse is located in Europe 
. Uhm… There’s no price history (in my database) for this product right now.
Link: Banggood product page
1. ($180.41): 2022ACTIESNL
2. ($182.35): BG00c906
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG9b65c5, ADMITAD2212
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $165.99).
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)).