Aliexpress
Click here… to search for Xiaomi Ninebot Plus Self Balancing Scooter on 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 (758.99 USD): 451feb
Coupon (775.49 USD): BGEBSC15
Coupon (815.99 USD): 7bcdf9
(CouponsFromChina.com tip: just apply this code 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): 918248, PICODICOM, 01294e, 5d1752, bGpAnDacHeCk, 320ddb, BGXMN4CN, BGSS20SW, BGAFF7OFF
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Ninebot Plus Self Balancing Scooter? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).