Keyboards from the dumpster at work

So we have a warehouse at work where you can pick stuff up for your office, or they sell it at auction. Things that they think are too old are thrown out though. They gave me permission to go through the boxes of "trash" and I found these:

Omnikey Ultra-T http://i.imgur.com/l0n2m.jpg

LK201AA (not sure where this is from) http://i.imgur.com/YXAfj.jpg

I also got a qtronix Scorpius-305 (http://i.imgur.com/AZenTl.jpg) but it is in pieces because I am cleaning it right now so I just grabbed that image online.

Does anyone know anything about these boards? As far as I know they are working (qtronix board tested). Should I sell them or keep them?