You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Pure electric battery life: 20-35KM Electric power life: 40-50KM, Motor: high speed brushless gear motor, Product size 135x 40x 110cm, Net weight: 19.5kg, Transmission: Shimano 6-speed shift, Battery rated power: 280.8Wh, Working temperature: -10 to 50 degrees, Brake: front and rear double disc brakes, Charger specifications, Motor Power: 250w, Material: Aluminum alloy + rubber, Gross weight: 24.5kg, Input voltage: 100V-240V, Maximum grade: 30 degrees, Tire size: 16 inch pneumatic tires, Packing size 80x 43x 60cm, Top speed: 25KM/H, Battery capacity: 36v 7.8ah (10 strings 3 and 2600mah), Maximum load: 120KG, Charging time: 5 hours
Aliexpress
There’re some similar (or not) items on Aliexpress
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 China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): PICODICOM, BGFDD2, BGITFIIDOD2VA, BGFDD2SCN, BGFDD2SCN19, bGpAnDacHeCk, 7bcdf9
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for FIIDO D2 Shifting Moped Electric Bike 7.8Ah Gray? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
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)).