Make, model, year? Motors Board on dot com is full of, well, "helpful" individuals. Got some pictures to share?
http://forums.ebay.com/db1/forum/Ebay-Motors/20
Depends on whether you will take what it is worth or, "I know what it is worth".
eBay is only one part of a successful selling strategy along with CL, Kijiji, AutoTrader, sign in the car window, card up in grocery stores, etc.