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 (211.44 USD): BGToys8
Coupon (211.44 USD): ADMITADBLACK
Coupon (211.44 USD): BG8OFFCOUPON
Coupon (211.44 USD): TTBLACK5
Coupon (216.04 USD): BGRCDrones6
(CouponsFromChina.com tip: just apply this code 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): BGV95015, bgssaff9, AFfbG10, BGV95012, BGCITYADS2019, BGAFF10OFF, BGTT10, bGhOnEy10, BGSERVO112, BGdragonBoat, BGSS10%SW, bgshOOp10, BGheli10, BgoFErTaSchInA10, BgcLuBofErtA10, 7bcdf9, BGWLtoys950, BGCuponation10, BGHONEY2110, BGDAVIS, BGMATT7, Drones6, BANGGOODSD, CouponsDE, BGheli1201, BGheli010, 2022ACTIESNL, BGheli3, Tabby20, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGJUNEGSG9, BGRCT10, COUPONSDE1wk, BGGutscheine
(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 WLtoys V950 RC Helicopter RTF 4 Batteries.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).