The cards I bought from another Net54 member arrived today. All of them are difficult, in varying degrees of toughness. Bolling was the last card in the set, so he is very expensive, Campos is just tough to find, and Hoak died in 1969 and was a notoriously bad signer during his lifetime. I'm glad to see that the Bolling looks like it is in fountain pen; I'm a sucker for fountain pen signatures.
The PSA grades on the top two are for the cards, not the signatures. With these three and the Smith, I'm up to 138/274 (50.36 %), just over the half way mark.