Clueless newbie curious about laser engraving, how cheap can I get a device for?

Laser engraving seems really cool. I don't need anything super professional, I'm just curious about it and engraving designs on stuff at home sounds fun. Unfortunately, I'm also pretty broke. How cheap could I get a laser engraver for, and how good/bad would it have to be? Is it even possible to get one or should I just not? And any recommendations?

Thanks!