First things first...I had the same thing happen in Christine the very first night she was out...Dude came up and looked her over and over, then hits me with the "Dude, you gotta sell me this car!!" crap...I told him my usual thing and he walked away never said anything...Came back about 15 Min. later with the same 'ol song and dance...Kept asking me to sell and to "Throw out a price"...
I had finally begun to get a little annoyed. I told him I really didn't want to sell right now. He tells me "Well, everythings for sale at some point"...I told him "yes, and fine, today isn't that point..You want to buy the attention this things getting tonight, NOT the car..I know where this thing will be in a week when your tired of it and it ceases to bring you that "High" of owning a new toy..Then, you'll reallize that you spent too much on it when NO one on Evil Bay will even come close to what you bought it for, let alone let you make a little on it..."
If you wanna sell, sell it... But remember, when the money's all gone, so is the car......