Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – WLtoys V911S RC Helicopter RTF [EU] (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (62.02 USD): 2022ACTIESNL
Coupon (62.69 USD): BG00c906
Coupon (62.69 USD): BGRCDrones6
(CouponsFromChina.com tip: apply it 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): V911S15, 502C6B, BGV91113, AFfbG10, BG911S15, BG91115, BGCITYADS2019, BGV911S18, BGWV911S15, BGWLV15, BGWL911S15, BGVDay10%off, BGW911S15, BGSP91115, bGhOnEy10, BGXYN11, BGLUCKY25, BGWLT12, BGROK3, BGMTW23, BGTSU16, BGRRTI34, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, BG4CH15, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, BGMATT7, Drones6, BANGGOODSD, CouponsDE, BGheli1201, 00c906, BGheli010
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – WLtoys V911S RC Helicopter RTF [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for WLtoys V911S RC Helicopter RTF.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).