eBay and a company called Profiles in History are auctioning off Star Trek stuff owned and produced by Matt Jefferies and Herb Solow including props and original sketches. Holy Cow!
http://members.ebay.com/aboutme/profiles-in-history/
Items include Matt Jefferies collection of 79 scripts (starting at $5k), a Kirk shirt ($6k), a Tholian web spinner model ($4k), a model of the soundstage sets ($7.5k), a modified AMT model used for filming ($15k), Kirk's toupee (just kidding), and numerous production sketches, including those of Vaal, Kirk's quarters, the Medusan's box, a the corridor opening of a Jefferies Tube.
How big a fan are you?