Aliexpress
Click here… to search for ATOMSTACK A5 M50 PRO Dual-Laser Engraving Machine 5.5W on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (432.39 USD): BG00c906
(CouponsFromChina.com tip: apply it in your 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): BGa7157b, ADMITAD2212, 2022ACTIESNL, BGbdcf25, 8Couponsde, BG0eb260, hoNEYbGdeAlS, BGb546a5, BG61968b, BGAR2420, BG8ReviTrage, BG2ca8af, Cuponation9, BGd50708, BgGoodie9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for ATOMSTACK A5 M50 PRO Dual-Laser Engraving Machine 5.5W.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).