Just check coupons out (with price alert and history). What is best price?
Engraving Accuracy: 0.1mm, Nozzle diameter: 0.4mm, Product forming size: 30x 30x 40cm
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Price history and price alert
Do you need price history chart (for all/most countries) for Lavewatch LW-10A 3D Printer US Plug? There we go.
Price records source(s): Gearbest
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)).