Much of the information above is not accurate. The most up-to-date answers are here:
https://www.sportscollectorsdaily.co...ings-premiums/
The Tilden is a unicorn. Fantastic find. Here's Dempsey:
The Ruth is a proof; the dimensions are wrong for the shipping envelope, which came with my card.
SGC does a nice job slabbing these; I used to own a Ruth in an SGC slab.