Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe . Well, there is one coupon available right now.
Link: Banggood product page
Coupon (629.99 USD): BG3162b6
(CouponsFromChina.com tip: apply code in your basket (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): 341d2f, BGe44bf9, BGAUGUST8
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for X9 PLUS 36V 15.6Ah 500W 10inch Electric Scooter [EU].
Price records source(s): Banggood
Click on image to enlarge.
You can set price alert (for Banggood).