Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (161.99 USD): BGAFF10OFF
Coupon (161.99 USD): bGhOnEy10
Coupon (161.99 USD): BGR349N
Coupon (161.99 USD): BgoFErTaSchInA10
(CouponsFromChina.com tip: you should apply the coupon in your 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): 110GTR349, 502C6B, BGchollodrones12, eschollodrones01, randy439, TTxBG10, eschollodrones02, BGGTR349, 10drones, BGGTR349es, BGGTR349T, aff7off, bgssaff9, BGSALEGTR349, BGWKR349, BG2019R349, AFfbG10, BGWKDI3, BGR3491, BgdT101, BGBinKupon8202, BGBFCR25, BGCITYADS2019, BG20R349, BGVDay10%off, BGMPB2020
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Diatone 2019 GT R349 TBS VTX Edition PNP.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).
The limit of 10 has already been reached. Any chance for more?
Of course, but you need to create price alert here