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!
The tape mod sounds like it got rid of some of the high frequency pinging and softened the sound of the keyboard down to a full and meaty thock.