Just check coupons out (with price alert and history). Do you want to know what the best price is?
15 Degree Tilt, Charging Time: 90-120min, 12KM/H Top Speed, Battery: 4000mAh, Weight: 9.5kg, CE Certification, 36V, Load Capacity: 120kg, Charging Requirements: AC100 – 240V / 50 – 60Hz
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Price history and price alert
Here is price history (for all/most countries) for Zanmax R1 Self Balancing Scooter JP Plug.
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)).