Play Network MC500 computer.
Intel Atom 32-bit CPU on an Intel Desktop Board, 2GB RAM, built-in serial, sound, video, etc… and has a CD-ROM drive.
No hard drive but comes with the power supply
Has an interesting set of buttons and a 4 line LCD display on the front of it. It connects to the computer’s USB port and has a USB-to-Serial interface. I had it set to display my amateur radio call sign when I had it on my ham bench.
Kinda slow for Windows 10, but worked. Would be good for for some variation of Linux.
Free. Yes. Free. Whoever can get it first can have it.