I have checked all old coupons and price is 519.99 USD for 500W Mid-Motor Conversion Electric (in Banggood). It is from EU warehouse.Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest price update (UTC time):
Banggood (519.99 USD)
Banggood warehouse is located in Europe 
. Is it good price? I’m not sure about the price, coz I have only 1 record(s) in my database. You can get coupon down below.
Link: Banggood product page
Price without coupon: 529.99 USD
Coupon (519.99 USD): BGfccc2b
(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): BGSPRING8OFF
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for BAFANG BBS02B 36V 500W Mid-Motor Conversion Electric Bike Kit 860C [EU] on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was 519.99 USD though.
You can set price alert (for Banggood).