Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. One coupon is available. Cool!
Link: Banggood product page
Coupon (206.07 USD): ADMITADBLACK
(CouponsFromChina.com tip: apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG0efc18, 6GSGIT, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Teclast X16 6/128GB Refresh 11.6 Inch Tablet? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).