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 (331.15 USD): BGGAL8
Coupon (331.15 USD): BGJON8
Coupon (338.35 USD): CouponsDE
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): BG69fd0b, BGDAVIS, 28RC, BG595XHD, BG30BETAFPV, BGfc68f3, BGc8a780, BGdb2ec8, Drones6, BG21a30f, 00c906
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Betafpv Beta95X V2 HD 95mm F4 16A 4S Drone BNF.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).