eBay seller smithy_154 has a lot of muhammad Ali and Frazier autographed items in a listing. Both the Ali's are forgeries, well one is an autopen. I can't comment on the frazier a since I don't know him too well but I would assume they are fake too

http://pages.ebay.com/link/?nav=item.view&alt=web&id=181744...

He has also sold another Ali forgery recently
http://pages.ebay.com/link/?nav=item.view&alt=web&id=181719...

Horrible!

Beware of the scammer