Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (196.57 USD): BGGAL8
Coupon (200.84 USD): Drones6
Coupon (200.84 USD): CouponsDE
Coupon (200.84 USD): 00c906
(CouponsFromChina.com tip: this code has to be applied 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): TTxBG10, BGss9%rc, bgssaff9, LD200GT, AFfbG10, 502C6B, BGBFCR25, BGCITYADS2019, BGAFF10OFF, bGhOnEy10, BG4GT, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, 7bcdf9, BG10RACING, BGMATT7, BGDAVIS, BANGGOODSD
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Kingkong 200GT Drone PNP.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).