The data on grading volumes is a little misleading
I had never seen the volume data from gemrate.com before so I did a little digging. About half that PSA volume is Pokémon and other TCG cards. If you break down May 2023, PSA graded 465k sports cards, 4.3% were pre 1950, so they graded about 20k “vintage” sports cards. SGC graded 71k sports cards of which 13.5% were pre-1950, so they graded just under 10k “vintage” sports cards. This is probably a better indication of SGC’s share in its core market. Their share undoubtedly declines in the post-war era due to PSA’s registry. Beckett and CSG aren’t really viable competitors in the vintage market.
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