You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
System: Android 7.0, CPU: Allwinner H3, 2GB RAM, 16GB ROM, Remote Controller Battery: 2x AAA Battery (not included)
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
Here is price history (for all/most countries) for Sunvell H3 2/16GB TV Box.
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)).