I would guess around $500. Here is a link to a memorabilia store with a large photo with multiple signatures selling for $500: http://www.sportsmemorabilia.com/spo...-greatest.htmlIt has a certificate of authenticity. I'm sure it fluctuates with the economy - probably at a low point now. The value would probably depend on whether you could show that the autographs are authentic. For example, pictures of you getting the shirt signed by each fighter.
"Be of good comfort, Master Ridley, and play the man! We shall this day light such a candle, by God's grace, in England, as I trust shall never be put out."
--Hugh Latimer, October 16, 1555