The cars on Ebay aren't selling because they are on Ebay. Most Ebay shoppers are expecting the deal of a lifetime, which ain't gonna happen with a car like the G8. Personally if I'm going to spend 20-25K on a car I want to buy it from a dealer who I can hold accountable if the car develops a bunch of problems. I'd also want the dealership to handle all of the warranty transfer too. You might pay a little more, but most dealerships are going to give you better service if you bought the car from them. How many times have you brought a car in for service and the first thing they ask you is "did you buy the car from us?" If you did, they have already made money from you and if they treat you right they know that you'll probably buy from them again. Go to the dealer and tell them you got the car off Ebay....good luck with that.

Just my .02 cents