PSA / SGC -- Price Points By Grade

[LincolnVT]

I know that it varies some by player, era and population, but I'm wondering how people go about calculating the value of various PSA or SGC cards. Is there a rule of thumb out there?

For example, take a SGC NM-MT 1948 Leaf Jackie Robinson...say that one sold or was to sell for 100k (made up number) what would the price break be on the same "make and model" of Jackie Robinson in say a SGC EX, SGC Fair and SGC A holder? Also, how would you calculate the value of a SGC Mint copy based on the NM-MT being worth 100k. Obviously, these numbers are always changing based on the most recent auction results.

It seems to be toughest to calculate the current market value of ultra rare cards / postcards / items graded by SGC and PSA that don't have recent auction results...any thought on these types of pieces?

Thanks.

Ethan

[x2drich2000]

In my opinion, too many variables to discuss, but as a general rule, I figure cards at roughly 50%-100% more than the next lowest grade. So if a PSA 4 sells for $100, a PSA 5 would sell between $150-$200, and a PSA 6 would sell for $225-$400. Obviously, the more grades you skip, the larger the variance gets.

Ultra rare cards (thinking less than a handful exist) I think the grade has less influence as people are more concerned with just finding the card rather than worrying about the condition. As a result, the difference between 1 or 2 grades may make little difference in the price.

DJ

[swarmee]

All depends on the set, the player, the population report, the people fighting for it. Especially at the highest levels. But generally, Poor is half of VG, which is half of EX for readily available cards. NM might be double or more than EX.

[Leon]

No one mentioned centering with respect to values and grades. Sometimes I think it can "double'ish" the price of cards in the same grade.