Mankeel MK016 14inch 350W 36V 7.8Ah Electric Bike [EU] (Banggood, Aliexpress: Motor Brushless, Certification ce, Rated Passenger Capacity One Seat, Origin CN(Origin), Style Standard Type, Max Speed <30km/h, Foldable Yes, Power Supply Lithium Battery, Brand Name Mankeel, Frame Material Aluminum Alloy, Wattage 251 - 350w, Wheel Size 14", Voltage 36V (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Best price?
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. I’m not sure about the price, coz I have only 1 record(s) in my database. Only one coupon available!
Link: Banggood product page
1. ($539.99): 341d2f
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG21b1b9, 8wEbgaInS5, BGd8c503, BG8ReviTrage, Cuponation9, COUPONSDE1wk, BgGoodie9, BGb24021, BGc8e14f
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
There is only one database record (it was for $459.99), so you can’t see price history chart.
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)).