Aliexpress
Click here… to search for LANKELEISI X2000PLUS 10.4Ah 48V 500W Electric Bike [EU] on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (1187.99 USD): eridingSeps
(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): BGEBSC15, BGAUGUST8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: 1099.99 USD.
You can set price alert (for Banggood).