A basic 3018 CNC machine with an acrylic enclosure, bought off eBay. I should have gotten a "pro" variant, as the one I bought did not have a probe header on its control board. I want to mill PCBs, and I can't really see trying to do that without a way to perform bed levelling. I found another control board on eBay that does have a probe header, but the physical connectors are different. Most likely I will resolve this by finding the right terminators and either making some adaptors or some replacement cables.
This impediment means it's going to be some time yet before I actually put this thing to use, though.