Who always gives you trouble authenticating?

[bjerome]

Mantle on nearly anything, DiMaggio on items other than late 80's - death baseballs, Williams on flats. If i'm looking for any of them to add to my collection, I am known to overanalyze it. I have taken a gamble once on a 56 Yankees Team ball for Mantle. The price was right and the other signatures I had enough familiarity with to confidently say were real to include an Elston Howard that I wouldn't be out money if the Mantle was clubhouse even after Fido made it his personal chew toy. All of the rest of my Mantle and DiMaggio's I have purchased from the same individual who I have complete trust in and commonly refer to as a Mantle and DiMaggio expert.