Hi I am in possession this Procol Harum album. With the signatures of the entire band on the cover, and and annotated on the reverse. if anyone could confirm the authenticity of the autograph? How much can be worth? http://s6.ifotos.pl/img/Coverjpg_exqxewh.jpg http://s3.ifotos.pl/img/Backjpg_exqxesa...