I actually bought one of these from them Discount Electronics a while back. They had been putting some old version of Windows on them and selling for $100 - but if you asked, they'd sell you one for $50 without the OS. They come from point-of-sale terminals and have a weird form-factor for fitting under a desk. Judging by the stickers left on the back, the one I had evidently came from a Cinemark movie theater ticketing desk.
These have roughly the capability of a RaspberryPi - but in a slightly larger form factor! :-)
But I guess if you need something with a parallel port - it might not be a bad choice.
-- Steve