Go down and check coupons out. Remember to check price history if it is available. Best price?
36V 4400mAh battery, Dual powerful 250W motors, max 18km/h speed, 10 inch inflatable rubber tire, Mileage (depends on road and driver weight): 15-20km
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Price history (for all/most countries) for Rcharlance 10 inch Self Balancing Scooter Red is here.
Price records source(s): Gearbest
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)).