Hi Mollie,
Can you take a look at All American Comics #61? It has the first appearance of Solomon Grundy, and I believe is noted as a "Classic Cover." It doesn't come up for sale all to often, but here are some recent results:
Grade Current Points Recent Sale(s)
8.0 (A3) 1620 $4011 9-17
6.5 1200 $20,000 9-17 and $15,000 on C-Link in 2017
5.5 960 $11,651 2-18
3.5 (B4) 101 $2509 7-18
1.5 (Q) 153 $2800 7-17
Not much data for low high grade blues recently, but lower grades blow away their current point values.
Thanks for looking.