Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Adapter Model: GE-12300, USB Cable Length: 140cm, Control Board: 3 Axis USB Standard Control Panel, Frame Material: Aluminum Alloy+ Acrylic, Stepper Motor: 3 Motors, Adapter Input: AC 100-240V 50/60Hz, USB Cable Port: MiNI USB, Max. Engraving Area: 20x17cm, Power Supply: DC 12V 2A, Machine demension: 31x26x23cm, Can Be Carved Materials: bamboo / wood / paper / plastic / leather / etc., Input: AV 100-240V, Adapter Output: DC 12V 3A, Laser Power: 500mW 5V/12V, Support System: For Windows 7, Name: Laser Engraver, Adapter Plug Standard: US Plug, Machine Color: Silver, Engraving Density: 0.1mm
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($140.99): BG589b2e
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Couponsde7, 2022ACTIESNL, Terence, BG1efeb0, MVC8SPRING, BG637ca5, Cuponation9
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for CNC2017 500mW 3 Motors Mini Desktop Laser Engraving Machine Kit DIY.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).