Inside Edition got a tour of the most expensive property on the market in America. The 33,000 square foot main house has vaulted ceilings. A magnificent gallery features western artwork and leads into a 2-story library and an incredible big screen movie theater. Who lives here? Billionaire oil tycoon T. Boone Pickens, who at 89 is putting it on the market for $250 million! Pickens has given away over a billion dollars to charity and much of the sale of the ranch will go to his foundation.