I would say Celtic Bill Russell might be on this list for he REFUSES to sign. i know that when he had an AMEX card he had an agreement with them that signing his slip with an "X" would have been good enough - and he also signed his per diem slip from the team that way, too. the less signatures there are out there of someone - the more they are worth so he has to be very high on the list.
i would also say autographs from "Cassius Clay" have to be worth a lot since he is now Muhammad Ali and his signature isn't as good as it used to be.
i would also say autographs from "Cassius Clay" have to be worth a lot since he is now Muhammad Ali and his signature isn't as good as it used to be.