Each card has four players on it and some have more than one Hall of Fame player per card. These cards are also very tough in top grades. The cards you have there are probably among the most undervalued cards in the entire hobby. Unfortunately for you, card pricing is based on pure demand rather than rarity. Like team signed baseballs, people do collect them and they have solid value but in comparison to single signed baseballs they don t measure up.
Collectors like individually signed baseballs and they also like their cards that way.
Now there are some exceptions to the rule. A Babe Ruth signed baseball will sell for much more than a team signed ball if all other aspects are equal. More people collect players rather than whole teams, so they concentrate on the individuals. Goudey Ruth is a great card, but it has three additional guys on the card that are not widely collected. It s almost like they don t belong on the same card as Ruth.