I have a nicely built RailCore ZLT 3D printer. I built this very solidly with a number of custom machined parts, making it quite rigid, and stout.
It's an older machine at this point, but it's built with quality parts and it just works. Would be a great addition to a printer farm, an affordable way to get into a large format 3D printer, etc.
Equipped with a Hemera head, heated bed, heated chamber, 3-point magnetic ball leveling mounts, etc.
I'm fairly sure I could part it out and sell it for more than I'm asking, but I don't want to deal with that.