Right now, you can get a diode laser engraver on eBay for around $100 USD. That sounds like a deal, but it’ll probably use some arcane proprietary software, won’t be terribly accurate ...

It even supports four different firmwares, from grbl, to smoothieware, marlin and even lasaurgrbl! It’s designed to support home-made laser cutters, diode based laser engravers, and even ...