Posted By:
cmokingJimB - that's a good and logical explanation.
I also wonder about the affect of GAI's half-grade on PSA 8 pops. When GAI first started business, some people crossed their PSA 8s to GAI 8.5s thinking the half-grade upgrade had value. In recent times, with GAI down in the dumpsters, those same cards may have gone back into PSA 8 holders. For example, I can see this:
In 2003:
Dealer buys PSA 8 Goudey.
Dealer crosses it to GAI 8.5
Dealer sells GAI 8.5 to collector, makes a few dollars.
In 2007:
Collector decides to sell GAI 8.5. Sells it in open-market and gets a price sub-PSA 8.
Dealer buys GAI 8.5.
Dealer crosses it to PSA 8
Dealer sells PSA 8 to collector, makes a few dollars.
I would imagine this would happen more for HOFers than commons.