Right now the best price with coupon code for RS-918 Plus HF SDR Transceiver MCHF-QRP is $359.99 (in Banggood). You can create price alert here, copy coupons and view price history. Best price?
RS-918 Plus HF SDR Transceiver MCHF-QRP Transceiver Amateur Shortwave Radio With Microphone Charger 3.4AH
Latest coupon and price update (UTC):
Banggood ($359.99)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. I think you want to know if the price is good. Hmmm, price is higher than average (which is $347.99 right now), so better set price alert down below…
Link: Banggood product page
Price: $359.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGBFDAY8, BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP, BGESJY8
(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
Check out price history chart (for all/most countries) for RS-918 Plus HF SDR Transceiver MCHF-QRP.
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)).