Muhammad Ali

What does a Muhammad Ali autograph cost?

From under fifty dollars to the mid five figures. The base is deep because he signed for decades and in enormous volume, and the top belongs to early or unusual items rather than to the signature.

What of his gets signed most often?

Photographs lead, and then something unusual: magazines are the second largest category on this index, well ahead of cards. Boxing produced covers rather than trading cards, so the canonical signable Ali object is a Sports Illustrated or Ring cover, not a card. Only a handful of his tracked items are cards at all.

Does his signature change over time?

Yes, and noticeably. Ali was diagnosed with Parkinson's syndrome in 1984 and his handwriting altered over the following decades, from a fast confident script to something slower and more laboured. That makes an Ali signature approximately datable from its appearance alone, which is useful for authentication and also a factor in price. This index does not judge authenticity, but it is worth knowing that a late Ali and an early Ali are different-looking objects.