[Seven]

I'm not going to say any of the Mantle's that I need to complete my run, because I feel like those will all be obtainable at some point in my life.

Oscar Charleston's Billiken issue. I love the history of our game, especially the history of the Negro Leagues. Charleston being one of the greatest players to lace them up, along with the mystique around him, has made me want one of his cards, but I love this issue particularly.

Also, while not a traditional card, the 1931 Harrison Studio's Josh Gibson post card, would also fit the bill. There's only one known copy of it, it's also double signed by Gibson himself, on the front and back.