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Originally Posted by Oil Can Dan
Is there any guide or other info on psa cert numbers here? Being that it seems vintage grading got super tough not too long ago it would be great to know whether I'm buying an older, easier to get a high grade vintage card vs a newer graded tougher to get card.
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https://allvintagecards.com/history-of-psa-flips/
You've probably already seen the above, although it doesn't address the question of how to deal with the 8XXX cert numbers. I believe that the 4XXX suffer from similar uncertainty.