Mileage 7.8Ah 20-40km(Pure Electric Mode) 40-60km(Moped System), Maximum Speed 25KM/H, Input Voltage 100 – 240V, System Voltage 36V, Model D3S Shifting Version, Battery Lion battery, Gradeability 30 degree, Power Assist System 3 gear power boost, Battery 7.8Ah, Max Load 120kg, Brand FIIDO, Recharge Time 5hours.
Price history, coupons and price alert are available on this page. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I’m not sure about the price, coz I have only 1 record(s) in my database.
Link: Banggood product page
1. ($589.99): BGFDD3SCZ
2. ($589.99): BGD3SMS
3. ($594.99): D3S2021
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGFDD3SEU, PICODICOM, issamFDD3SEU, BGFDD3SEU19, BGFDD3SEU11, BGFDD3SEUB5, BGFDD3SEUXM, bGpAnDacHeCk, 7bcdf9, EUBGFDD3S78, ISSAMEUFDD3S78, BG9AD3S, BGFDD3SBDS, BGEBSC15
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history is not available for this item (not enough database records)! The lowest price was $589.99 though.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).