Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the 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 and price update (UTC):
5.5 inch, Android One, Snapdragon 625, 2.0GHz Octa Core, 4GB RAM, 64GB ROM, 3080mAh Battery, Dual 12.0MP Zoom Lens, Touch Sensor
Price history and price alert
There is only one database record (it was for $219.99), 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)).