The book value is apparently $50 as of October, 2011, but what you can actually get for it might vary quite a bit.
If you have authentication, I would guess a minimum of $400 and maybe as high as $800 per jersey.
John Elway is currently married so one should hope he isn't dating anyone.
Elway, but not by much
Jack Elway's birth name is John Albert Elway.
Jack Elway and Janet Jordan
John Elway.
John Elway!!
John Elway, John Elway, and you guessed it, John Elway.
John Elway was born on June 28, 1960
John Elway has four children.
John Albert Elway Jr.
John Elway. Elway did more with less than any quarterback in NFL history. Aikman was a fine quarterback, but he wasn't in John Elway's league.