Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (688.99 USD): BGb7e70d
Coupon (688.99 USD): bgshOOp10
(CouponsFromChina.com tip: just apply this code in your 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): aff7off, 1Email5
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for Magic Ben MAG1 4G M3-8100Y 8/256GB Laptop Tablet? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).