Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – FIIDO D1 Electric Bike 7.8Ah Black (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (429.99 USD): BGFDD1CN
Coupon (590.99 USD): 7bcdf9
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): 820c20, PICODICOM, 686e69, BGFDD1CN19, bGpAnDacHeCk
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – FIIDO D1 Electric Bike 7.8Ah Black (-3 USD)
Price history and price alert
Price history (for all/most countries) for FIIDO D1 Electric Bike 7.8Ah White is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).