These tires were used for two laps in qualifying in the rain on a SSB Camaro (lighter weight V6, easier on tires than a Z28) Perfect condition, still have the little rubber pointy things on the corner blocks, full tread of course. $300 plus shipping
Here's a link to a website with some pictures...
http://sccaforums.com/forums/1/318153/ShowThread.aspx#318153