I never really followed the prices of this card until I saw this thread that it is suddenly a $100,000 card in PSA 10. Like Peter, I don't really "get" the PSA 10 thing.
The card is $100,000 in PSA 10 and less than $300 in PSA 8.
On the same night PWCC auctioned off the PSA 10, PWCC auctioned off two PSA 8s and they sold for $260.55 and $276.02.
Most of my collection is stuff outside the big four sports, but I think I would be satisfied buying an "8" for $300 and using the other $99,000 for Ruth, Cobb and Wagner cards that are actually rare.