Step-by-step on PSA, Beckett & SGC grading. From authentication to slabs, avoid pitfalls & boost resale. My Griffey Jr.
PSA led all authenticators with more than 1.97 million cards graded, including 1.27 million TCG and non-sports cards and more ...
Founded in 1998, SGC has earned its reputation as one of the most reliable grading companies in the hobby. Its iconic black ...
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