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davidcycleIf that's the case, Bob, that would show the irrationalness involved in slab collecting. If a collector feels a PSA7 is more reliable than a SGC7 or GAI7, that is one thing. If collectors says a PSA AUTH (trimmed) is worth more than the same card SGC AUTH (trimmed), that is irrationalness demonstrated.
What would be their rationale for paying less for the GAI label and more for the PSA label on the same card with the same AUTH (trimmed) grade? Do they say GAI is less reliable than PSA at detecting trimming? The problem with this reason is it would be reason for paying more for the GAI label not less, as it would mean the GAI labeled card has a higher chance than the PSA of being not trimmed.