Are we talking sentimental value, or monetary value? Because a signed Chipper Jones rookie card can go for between $1-$5 or $20-$30 (and that's really just for the signature, and if you find someone willing to pay such a high price for the signature), but a signed baseball can go for more than twice that. I think the baseball holds a higher sentimental value as well, in my personal opinion, it holds a higher significance to the game. So, yeah.