1948 Bowman (Stan Musial)
The St. Louis Cardinals icon is one of the most consistent and greatest hitters of all time, but he is also sometimes considered the most overlooked or underrated athlete in the history of modern American sports. However, he has been immortalized by this set. The 1948 Bowman Stan Musial is the oldest card which is still relatively affordable. Although it is not highly likely that you will find one of these cards in your attic, it is not totally impossible. At any rate, putting effort into looking for one is worth it since this card in good condition goes for more than $1,000.
1914 Baltimore News (Babe Ruth)
Arguably the greatest baseball player of all time, Babe Ruth is also among the most endearing sports figures in history. The MVP award in the World Series is called the Babe Ruth Award and the MLB presents the top home run hitter of the year with the Babe Ruth Home Run Award. You might think this the reason why a copy of the 1914 Baltimore News Babe Ruth card fetched $575,000 even though the card just got a grade 2. However, it is actually the rumors claiming that only 10 of these legendary cards are in existence that are making this card so expensive.