Haha mustangs are shitty!!!! I wouldn't take any mustang for free!! with the exception of Elenore!

falcon punch ftw! :D

Or maybe he's a student and it's his part time job while he studies, and the car was brought for him by his parents. Or perhaps he's good with money and saved for it, or is paying it off. Or perhaps he recently lost a job with a higher paying salary. Or perhaps he had a job a bit higher up in the supermarket than being a cashier or shelf stacker. Lot's of possible reasons.

Good guesses, twinklestar, but the most likely explanation is that Ford or the bank was all too happy to lend John the money for the Mustang even though he really can't afford it. That's the American Way! Ford gets to say it sold another car, the lender gets to say he made an interest-paying loan and John gets the car that helps him get pussy. Everyone's happy, right?! In a few months, John will fail to make a payment and the bank will repossess the car and sell it at auction for a loss and John will lose his girlfriends because who wants to date a car-less hobo? We've been giving away houses for years with the same reckless abandon, but instead of repo, they call it "foreclosure" and it is at the heart of our financial crisis. More predictions: John will get both girls pregnant, get involved with crystal meth, lose his job and the sweet ride, and become a deadbeat dad. The OP would be wise to dump this loser, but I doubt she will be.

Or maybe it's a shitty V6 Mustang that he tried to trick out like an asshat and his girlfriend is dumb enough to think it's nice. I'm more inclined to go with this one.