I recently sold my 1989 Honda Civic - I used Ebay and got about $500 more than I expected.
Everybody I talk to seems surprised that I did this. Hell, I've bought two cars off Ebay and have sold two cars (including this one) on Ebay. If you know what you're doing, it's a pretty good way to advertise or look for used cars.
Anyway, I sold this car to a guy who is sick and tired of his high gas bill - he drives a Jeep and his place of employment just moved to the other side of the county.
Some folks may think that you can get rich selling crap on Ebay. Although I think it might be possible, it would only be true if you know what you're doing.
