$329.99 – Malahit-DSP2 2.40 2nd Generation SDR Malachite Receiver Radio (Banggood, Aliexpress: New Firmware 2.40 Genuine Second Generation Malahit-DSP2 SDR Malachite Receiver Radio 10kHz-380MHz 404MHz-2GHz (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $329.99 for Malahit-DSP2 2.40 2nd Generation SDR Malachite Receiver Radio (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest coupon code price check (UTC time):
Banggood ($329.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Is it a reasonable price for this item? From what I can see this price is higher than average price ($322.39).
Link: Banggood product page
Price: $329.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG09aa0f, BG93757b, BGSPRING8OFF, BGHONEYSP, BG5d7e36, BGESJY8, BGc0c501, 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
Price history (for all/most countries) for Malahit-DSP2 2.40 2nd Generation SDR Malachite Receiver Radio is here. The lowest price was: $319.99.
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)).