1933 Goudey Lou Gehrig
Goudey Lou Gehrig retired in 1939 with a record for the most consecutive games played at 2,130. Ever since Cal Ripken Jr. broke the record but today a PSA 10 1933 Goudey Gehrig card in pristine condition goes for $33,000. In 2007 it was auctioned for $274,950 and this card, in particular, is the only PSA 10.
1911 General Baking Ty Cobb
Baseball cards used to be packed in any way, whether it was candy, gum, cigarettes, or more. Among many cards, this is an example of PSA 8 that was sold with loaves of bread. It sold for around $272,980 in September 2008 and its Cobbs highest graded card. Today it would earn you a fortune!