Teenage sports fan snaps up NBA Hall of Famer's training jacket for $3 at thrift store... now Sotheby's expects to auction it for vast amount

Quinn Brown, 19, found an authentic Wilt Chamberlain warm-up jacket that he wore during the 1972 NBA Finals in a bin at Goodwill. He paid a mere $3,07 for it and it bound to make thousands off of it.