Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (62.36 USD): BGEachine10
Coupon (62.36 USD): BGVehicles10
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGEAT10, BgcLuBofErtA10, BGEachine2021, BGCuponation10, BGHONEY2110, BG0519919, BG05189191, BG05189192, BG0622919, BGVehicle10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Eachine EAT10 RC Car RTR.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).