This is the one I got. For exactly what you’re speaking about.

Comgrow Laser Engraving Machine...



Small, inexpensive, very very easy to use. It certainly has limitations to just being an engraver (although it will cut card stock and the like, maybe super light balsa or something). It’s chinesium to be sure, and maybe just a little wonky, but it’s done great for me. Essentially anything you can snap a pic of on your phone it will engrave, including grey scale. 

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".