I have a Unicomp SpaceSaver (us layout, usb, buckling spring, black with metallic gray):
http://pckeyboards.stores.yahoo.net/en104bl.html. Good condition... used lightly for 2 months.

Looking to trade this for any board with MX blues or browns... ideally a tenkeyless

I can offer the Unicomp + cash to make up the difference, depending on what you offer.
PM with any trade offers.