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 (129.72 USD): BG49a440
Coupon (233.50 USD): BGEachine10
(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): BgcLuBofErtA10, BGCFun10, BGCinefun, BG15CINIFUN, BGEachine2021, BGCF1S, BG20CINIFUN, BG10RACING, BGCinefun15, BGD3CN, BG405a22
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Eachine Cinefun 1S 75mm Drone BNF is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).