Aliexpress
Click here… to search for CUBE Thinker 8/256GB Notebook on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
Coupon (599.58 USD): Email5
(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): ALLBGY30, bgthinker10, Wholesale20, aff7off, bgthinker14, bgthinker715, BGTHIN715, BGALL814, affiliate6, BGALL42321, BGBFCR28, BGCITYADS2019, BGMPB2020, BGAFF10OFF
(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 CUBE Thinker 8/256GB Notebook.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).