Just check coupons out (with price alert and history). 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):
11.6 inch Windows 10 Intel Celeron N3450 Quad Core 1.1GHz 6GB RAM 64GB eMMC Bluetooth Dual Cameras
Price history and price alert
Price history (for all/most countries) for Teclast X3 Plus 6/64GB Tablet is here.
Price records source(s): Gearbest
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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)).