Aliexpress
Click here… to search for Xiaomi RedmiBook 8/256GB i5-8265U MX250 Laptop on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (589.99 USD): BGXMRM9
Coupon (679.99 USD): Wholesale20
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGRM430, aff7off, BGXM0717, BGXMRED14, BGRM7521, affiliate6, BGRM265U, BGXMRM430, BGXMRM4301, BGXMRM2, BGXMRM4, BGXMRM5, BGXMRM6, BGXMRM8
(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 Xiaomi RedmiBook 8/256GB i5-8265U MX250 Laptop? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).