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 (303.99 USD): CouponsDE
Coupon (303.99 USD): Drones6
(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): BGChollodronesB4S, BgcLuBofErtA10, BG11Racer, BGBFGEPLR, BG15GEPLR, BGXMSLR4, BGXSBABY, BG10RACING, BG9MCH, BGDAVIS, BGMATT7
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for GEPRC Crocodile Baby 4inch Drone PNP is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).