Aliexpress
Click here… to search for FIIDO D3 Mini Electric Bike White 7.8Ah on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (479.99 USD): BGFDD3BCN
Coupon (583.85 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): PICODICOM, BGFDD3CN11, BGFDD3CNB5, BGFDD3CN, bGpAnDacHeCk, Wholesale20
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for FIIDO D3 Mini Electric Bike White 7.8Ah? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).