I have just checked coupons. The lowest price I could get is 101.19 USD for 6 Bands USDR (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood (101.19 USD)
Banggood warehouse is located in China. But wait a sec… Is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal 81.49 USD) There are 2 active coupons in my database. Check it out.
Link: Banggood product page
Price without coupon: 109.99 USD
Coupon (101.19 USD): BGSPRING8OFF
Coupon (101.19 USD): BGHONEYSP
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGcabc5c, BGGines, BGBFDAY8, BGNEWYEAR8
(probably won’t work, but you can try them out)
Aliexpress
Click here… to search for uSDX 80m/40m/20/17m/15m/10m 6 Bands USDR HF QRP SDR Transceiver on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for uSDX 80m/40m/20/17m/15m/10m 6 Bands USDR HF QRP SDR Transceiver? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).