I'm watching an old episode of Antiques Roadshow. A guy brought in a 1969-1970 Chicago Bears jersey that was Gale's. He said his wife wanted to tear it up into rags. The A.R. guy lost his mind. Went on and on about the Kansas Comet. He said he was the youngest man ever elected into the NFL Hall of Fame (I didn't know that!)
Anyway, he projected the value of the jersey to be $25,000 - $30,000.
Good stuff.