Aliexpress
Click here… to search for ATOMSTACK S10 PRO Flagship Laser Engraving Cutting Machine on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (299.00 USD): BGc6fc00
Coupon (302.00 USD): BG8a33b4
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Old coupons (from the oldest to the newest): BGd2e9c5, BG0c043d, BG1b3db5, BGbd2d38, 2203ActiesNL, BG903a15, BG8055c0, BG73c1b2, BG6081bb, BG564787, Cuponation9, 9OFFSUMMER, BG02d038, BG45199a, BG905ba6, BGad7bc3, BGfda0c4, BGd0d200, BG56162c, BG4ce4d6, BG589b2e, BGf98a70, BG312929, BGea19a2
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for ATOMSTACK S10 PRO Flagship Laser Engraving Cutting Machine.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).