EDIT - Sale pending
I have a broken IBM Model M Space Saving Saver keyboard for $50 shipped CONUS
AS IS no guarantees. I bought it broken; it's never worked for me. Someone who likes to fix Model M boards should take it.
When I first got it The following keys didn't work zxcvbn, Spacebar, L CTRL, both ALTs. Today I'm noticing the Backspace seems to be stiffer than it should be.
Did I mention AS IS, no guarantees?
EDIT - $50 is with no SDL cable. You want a cable, then it's $60 Shipped CONUS.