So, I'm new to the forum. Had an IBM Model M for a few months now after reading about them. Bought a lot on ebay of 2 of them, one working. My working one is a 1994 made by Lexmark, but the version WITH removable keycaps.
Originally found the forum searching for a solution when my cat spilled a glass of water on it and the "h" and "m" keys suddenly started working together, ie, hitting either would net "hm" on the screen. I disassembled it and dried it with a hair dryer, though, and it seems to be fixed.
I also have a 1989 one that is missing 8 keycaps and the SDL/PS2 cable. I know I can get the keycaps on clickykeyboards.com, but SDL to PS/2 cables seem a bit harder to find. Any idea where I could get one? The ClickyKeyboards seems to be sold out constantly. Might just have to check resale stores I guess.