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 (213.37 USD): Drones6
Coupon (213.37 USD): CouponsDE
(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): BGAX36015, AFfbG10, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGX36012, BGAFF10OFF, BGTT10, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGheli10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10, BGDAVIS, BGHONEY2110, BGMATT7, BANGGOODSD, 6GSGIT
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for ALZRC X360 FBL 6CH RC Helicopter Kit With 2525 Motor V4 50A ESC is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).