Sun Microsystems Sun Ray 2 thin client. The network really is the computer.
These things have a surprising following to this day, and they're actually capable of a fair amount, since all the computation is handled remotely. I was reading a blog post about how to run these from a current Illumos vesion, and it's tempting, but I have a one-bedroom apartment and a full-featured computer within a few steps at all times, so it's not really solving any problems I have.
Still, nice piece of hardware. I've verified it boots and pops up the connection screen. I have not actually tested all its features, but I'm pretty confident. No power brick included, but it takes a widely-available 12V barrel plug. (I borrowed one from an external hard drive dock to test.) Has DVI output, USB input. Communicates via wired Ethernet, and has a smart card reader that can be used for session management. Audio and serial round out the ports.
Good physical condition, some scratches, particularly around the little plug at the top. I know I've taken it apart before, but I've also put it back together.