I have checked all old coupons and price is 231.84 USD for Version 1.10D Malachite (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest price update (UTC time):
Banggood (231.84 USD)
Banggood warehouse is located in China. Is it good price? Well, this price is higher than average price (231.33 USD) Nice, I’ve got 2 active coupon codes for you!
Link: Banggood product page
Price without coupon: 239.99 USD
Coupon (231.84 USD): BGSPRING8OFF
Coupon (231.84 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): BGCAPITALOS8, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for Latest V9 Version 1.10D Malachite Radio Dual Antenna Malahit-DSP1 on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Latest V9 Version 1.10D Malachite Radio Dual Antenna Malahit-DSP1.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).