1955 Topps Sandy Koufax
Although his career, unfortunately, ended early because of injuries, Koufax was honored in the Hall of Fame in 9172. He was elected at age 36, making him the youngest player to be inducted. In August of 2018, a grade 9 card sold for $215,100. Ever since there have been just three PSA 10 1955 Topps Koufax cards.
1914 Boston Garter Joe Jackson
This card was initially intended to be on a clothing store window display. Today there are just around six in existence. in 2017, the 1914 Boston Garter Jackson PSA 5.5 sold for $204,000 and today it would go for much more. It is one of the best looking cards in history.