Leaf Trading Cards MLB 1990 Leaf #220 Sammy Sosa RC PSA 10

The Foundation of All Great Collections. Professional Sports Authenticator (PSA) is the largest and most trusted third-party trading card authentication and grading company in the world. Since its inception in 1991, PSA has certified over 40 million cards and collectibles with a cumulative declared value of over a billion dollars.

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1960- Present