Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood).
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG717000, BG589b2e, BGMARCHSALE, BG239176, BGc89496, BGd7ed27, BG835b24
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for GPD WIN Max 2 32GB 2TB R7 6800U Notebook 10.1 Inch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).