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 (158.23 USD): BGJON8
Coupon (158.23 USD): 8Couponsde
Coupon (158.23 USD): MVC8SPRING
(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): BGRE3RC, BGDAVIS, xollodrnes18, BGRK3NANO, BGMATT7, BGJPREKON3, BGR3NRC, BGBRRekon3, BGcefd60, BG2ded95, BGR311V, BG81744c, BG0fbaea, BG5bbe3d, BGbe7307, BGRURK3, BGb04fd4, Drones6, BGf78e28, BG25R3, BANGGOODSD, BG30RK3, BG28RC, BG86cb24, BG90ab8f, BG48553a, BG40REKON, Tabby20, CouponsdeFPV
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for RekonFPV Rekon 3 Nano 1S 140mm Drone BNF.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).