The coupon price for RS-918 Plus HF SDR Transceiver MCHF-QRP is $369.99 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
RS-918 Plus HF SDR Transceiver MCHF-QRP Transceiver Amateur Shortwave Radio With Microphone Charger 3.4AH
Banggood ($369.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Low/high price? Hmmm, price is higher than average (which is $347.99 right now), so better set price alert down below…
Link: Banggood product page
Price: $369.99
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, BGALL8
(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)).