I've got two Zenith ZKB-2's to sale. You can see a detailed post of the board cleanup you can see
here.
The board listed as Board 2 has (mostly) Yellow Linear Alps and is in good aesthetic condition. The board works, but the Q takes a little effort to press. A quick solder should fix it.
Asking Price: $110
The board listed as Board 3/the runt has all Green Linear Alps. The board has a few chips out of the plastic on the back, but it is in good working condition. The control key has a melt mark on it.
Asking Price: $105 SOLDFirst come first serve. PM me.
Proof I possess these beautiful creatures (besides the cleanup thread):
Edit: 2-25-16 Updated photo with timestamp.
Edit: 2-26-16 Other green board is sold.