You can get Malahit-DSP2 2.40 2nd Generation SDR Malachite Receiver Radio for $349.59 with coupon (from Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
New Firmware 2.40 Genuine Second Generation Malahit-DSP2 SDR Malachite Receiver Radio 10kHz-380MHz 404MHz-2GHz
Latest coupon and price update (UTC):
Banggood ($349.59)
Banggood warehouse is located in China. The question is – is it a good price? Well, this price is higher than average price ($322.39) One coupon is available. Cool!
Link: Banggood product page
Price without coupon: $359.99
1. ($349.59): BGALL8
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Old coupons (from the oldest to the newest): BG09aa0f, BG93757b, BGSPRING8OFF, BGHONEYSP, BG5d7e36, BGESJY8, BGc0c501
(these codes were not working in latest coupon update, but you can check them 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.
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)).