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 (899.99 USD): BG71c041
(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): PICODICOM, BGnowosc15, picodicom, TTHLFL8, TTHLFL819, 5d1752, TTHLFL811, TTHLFL8B5, bGpAnDacHeCk, Wholesale20, 7bcdf9, issamlfl8, BGAFF7OFF, BGBSLFTL8, BGL89A, BGEBSC15, BGL8SS7S, BGissam4771, BGL8S6CS, BGL8SSCISSA, BG0e0a08, 00c906, ERidingMarch, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for LANGFEITE L8S 15Ah 48V 800Wx2 Electric Scooter.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).