Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (140.31 USD): BGGAL8
Coupon (140.31 USD): BGJON8
Coupon (143.36 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): BGFGV2, AFfbG10, BGBFCR25, BGCITYADS2019, BGWKEGG, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, BGEGG35, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BG11PP12, BG10RACING, BGMATT7, BGDAVIS, BGFLYING10, Drones6, BANGGOODSD, 00c906
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for KINGKONG/LDARC FLY EGG V2 Drone BNF.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).