Posted By:
JustinI know there is a 1 of 1 Alexander Cartwright Auto from the Upper Deck SP Legendary Cuts series.
I imagine that could potentially be one of the highest for a baseball card.
Also kind of Off-Topic,
But in Fred Lieb's book "Baseball As I Have Known It" he talks about a Matty tribute game that was played at the Polo Grounds in 1921 I believe, but they auctioned off a baseball signed by President Harding, VP Coolidge, Babe Ruth, Christy Mathewson, John McGraw, and other NY baseball luminaries. The ball went for 450 dollars, and the winning bidder promised to pay by check. The crazy thing is he never did, and so that baseball is lost to time. But that would a very cool thing to see.