When 4 IBM Model M keyboards showed up during a cleanup at work (university) and I was asked if I wanted one, I of course said yes!
It's an IBM model M 1394540 from 1992 with the PS2 connector and the detachable cable. The keyboard and cable are in very good condition, even the manufacturing sticker on the back looks pretty good! All keycaps present, all keys work. It just needed "some" cleaning which ended in a 3h long process haha.
It will definitely be my daily driver for the next few weeks. I haven't decided yet if I will use it long term. I'm actually very happy with my modded Keychron Q6. Maybe I'll try some lube on the stabilizers and perhaps a little tape mod.
The best part was that I got to take a second Model M with me, which I will give to a good friend. This one is also in great condition.
It was an incredible day!
I happened upon two of these in much the same way, one of them unfortunately doesn't work but the other one has been my home office keyboard (too loud for the office) for many years. I've always wanted to fix the broken one by swapping in a modern controller, maybe even make it wireless (because that would be truly absurd).