You've struck a nerve. In a good way.
I think there are some really silly SP card prices in the last few batches. I've looked for come comparable "established" cards, and here's what I found.
Doc White 1906 (10.13) and Hippo Vaughn 1918 (10.06).
Compare their cards with Lefty Grove '31 and Carl Hubbell '33 - I think Lefty and King Carl have them beat. A couple of the new, more modern, cards - Warren Spahn '53 and Wilbur Wood '71 - seem to have been more reasonably priced.
Carl Mays 1917 (9.28) seems to me to be pretty comparable to Mort Cooper and Amos Rusie, who in turn are comparable to McGinnity and Red Faber.
John Smoltz '96 (9.36) looks to me like he should be priced somewhere around Seaver '71 or Clemens '98.
And please explain why the new Saberhagen card is $2 million more than the '94 version.
I also find the new Randy Jones card to be wildly overpriced, but there are no good matches (how many LHP with 3 BPHR against lefties and none against righties and a balance rating of 1L are there?). I'd rather use Ford 58 or Koosman 69, though.
And don't even get me started on the Bart Colon card. Two guys I found with comparable cards are Whitlow Wyatt 1940 and Jim Perry 1960, This is beyond silly.