collingwood team autographs 1979

Hi all,  i just found an autograph book i had passed
around at training when i was a kid.  it has the 1979
collingwood team autographs.  was a real memory trip,
ray shaw, bill picken, russel ohlsen, ron wearmouth etc... 
lots of young names like wes fellowes and tony shaw.

though with it came the bad memory of ken sheldon kicking that
goal to finish off the '79 grand final :)

anyone know if these kind of autographs have any value,
or how to find out ? 

cheers,
Simon.