[bk400]

So I'm looking at prices for iconic HOF rookies pre-1980, and there are a lot of these regional or oddball rookie cards out there. The graded population (at least the PSA and SGC populations) are often 1/10th that of the mainstream rookie cards, while the realized sales price is at a substantive discount.

We see this with the O Pee Chees and, more acutely, with all the random oddball sets. But the oddball sets are mainstream enough to have a PSA auction prices, ebay listings, and pop reports.

Intuitively, this doesn't make sense to me. Perhaps a stupid question, but in other markets for investible products, this sort of pricing differential would rarely happen. Any thoughts on why this is the case?