Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (334.71 USD): BGToys8
Coupon (334.71 USD): BGJON8
(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): BGMAMFU24, BgcLuBofErtA10, 7bcdf9, BG10RACING, BGAFF10OFF, BGMATT7, BGDAVIS, Drones6, BANGGOODSD, CouponsDE, 00c906, BGGAL8
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for AuroraRC MAMFU24 4-6S Drone.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).