Posted By:
barrysloatePSA found the answer to this problem by creating the set registry. It was a brilliant piece of marketing.
I have a fairly large inventory of both PSA and SGC graded cards, and I can't tell you how much better an SGC card of comparable grade looks over its competitor's.
I think in the collector market, say between the grades of Good to Excellent, it is just a matter of time before SGC cards sell for a premium over PSA. I think in some ways we are already seeing it.
But the set registry market, which I deem a different hobby altogether, props up the prices of these higher grade PSA cards. Only time will tell if that will ever change.