Anyone interested a Tektronix 4317? It's about 25 years old, I don't have a keyboard, but last time it was turned on (about 20 years ago?) it booted to a login prompt. I think it's a 68020 in there and I think it was running some flavour of BSD. No promises. Also, no password.
Also posted to ソ-ラ-バ-ド-のおん; comments at Dreamwidth.