Aliexpress
Click here… to search for T-BOOK X9S I5-8400 8/256GB GTX1050Ti Laptop on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (892.99 USD): affiliate6
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGTB717, aff7off, BGTB2706, BGTB22706
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for T-BOOK X9S I5-8400 8/256GB GTX1050Ti Laptop.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).