[FrankWakefield]

I think that in the 70s and 80s the demand for Wagner cards and Jackson cards was less, relative to cards in general. Mitchell was the key card then.

It isn't that the Wagner throwing or the Jackson is less plentiful than Mitchell, but now there are more folks who want a 'Jackson' card or a 'Wagner' card, so one from E90-1 will do. That demand has made it tougher to get one of these cards, of late. If money were no object, a super whale buyer could more readily find Wagner throwing or Jackson cards to buy, and not as many Mitchell's, Sweeney's, Graham's, Shean's, and maybe even Upp's.