I believe the Demaree Die-Cuts lack of price parity with other contemporary bubblegum cards can largely be attributed to their rarity and the oddly sized format. Nobody knew what to pay because nobody knew what was out there.
The full story of the R304 "find" was published in SCD a year or so ago, along with checklist additions that bring the known checklist to nearly 100%. The story is available right now on the
www.collect.com/auctions home page, via a link on the right-hand side.
I'm not sure what standards PSA applied to these cards when they were submitted for grading, but the slab grades are excessively harsh, in my opinion. I examined the cards when we met with the consignor. They have exceptional eye appeal, especially for cards that are in many (most) cases currently the only examples of those players.