My grandfather told me a story that I believe he heard from another guy about an old man they knew who had an early Model T in something resembling new condition. Ford had just introduced the Model A and either Ford or a dealer wanted the old man's Model T as a museum piece and they offered to trade it straight up for a new Model A. The old man took the deal, but returned the car some short time later to get his Model T back because the Model A was just too fast. My grandfather couldn't remember if the guy got his T back or not.