Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
Coupon (1255.79 USD): Cuponation9
Coupon (1269.59 USD): hoNEYbGdeAlS
Coupon (1269.59 USD): DealBGimpact
(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): BGf2e12e, pROMo8cuPoN, BGacabc6, BGJUNEGSG9
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for MACHENIKE S15 15.6inch i7-12700H RTX3050 16/512GB Laptop.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).