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Crossovers - overestimating the graded populations?

Crossovers - overestimating the graded populations?

Do the PSA and SGC population reports overestimate the true population of graded cards?

Baseball, Grading, Investments, PSA, SGCGregory PopeMarch 6, 20191910 Tip Top Bread Honus Wagner, Vintage Baseball Cards, Vintage Cards, Honus Wagner, PSA, SGCComment