Price Guide is based on average prices of recently closed
auctions for a single signed baseball, and autographed photo
for the following players: Gary Sheffeild, Cal Ripken Jr.,
Paul O'neill, Mickey Mantle, Joe DiMaggio, Barry Bonds, Roger
Clemens, Don Mattingly, Hank Aaron, and Duke Snider. Signatures that
have not been properly authenticated could sell at half the
market value or less.
Autograph Samples are taken from Authenticated Signatures.
the following Link for the complete A-Z Single
Signed Baseball Price Guide