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PASJDHaven't we had this discussion many times? Anyhow I think the premise of your question -- that all three companies will grade your cards the same way -- may be flawed. Also I think it depends on the issue -- my very general impression is that on early cards such as T and E cards SGC is very strong but on later stuff a PSA graded card will sell for more than the equivalent SGC or GAI graded card.