The first flying cars are set to go on sale to the public as early as 2015. Terrafugia has announced its Transition design, which is part sedan, part private jet with two seats, four wheels and wings that fold up so it can be driven like a car, will be on sale in less than two years. The Massachusetts-based firm has also unveiled plans for a TF-X model that will be small enough to fit in a garage, and won’t need a runway to take off. Would you buy one?