Where are you located? If it's the Bay Area try using Craig's List first. I sold an Alfa Romeo (great car but nearly sale proof) on Craig's list in a week. Best of all it's free. I like EBay but I agree that if you are in a good sized metropolitan area it pays to try to sell it locally first.

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LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold