I have just checked coupons. The lowest price I could get is $140.99 for 5-10W USDX USDR HF QRP SDR Transceiver SSB/CW (in Banggood). Get coupons, create price alert or check price history out! Best price?
Latest coupon and price update (UTC):
5-10W USDX USDR HF QRP SDR Transceiver SSB/CW Transceiver 8-Band DSP SDR + Microphone +Battery + Charger – EU Plug
Banggood ($140.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Low/high price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $134.74)
Link: Banggood product page
Price: $140.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG49ddd3, BG9285df, BGMARCHSALE, BG20236Tool, BGTOOS729, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP, BGESJY8, BGALL8
(I don’t think these’re gonna work, but you can try ’em out anyway)
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
Do you need price history chart (for all/most countries) for 5-10W USDX USDR HF QRP SDR Transceiver SSB/CW? There we go.
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)).