Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (263.19 USD): BG00c906
(CouponsFromChina.com tip: this code has to be applied 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): BG5da3df, 2203ActiesNL, BG1efeb0, 8BGwbg2204
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for LAOTIE 60V 38.4Ah 3000W Hub Motor for LAOTIE ES19 Electric Scooter.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).