You could do this manually, but a simple search of ebay listings (both current and sold) could give some idea as to the relative population of these cards. And maybe give some insight into the true 'SP' numbers. There may be some skewing of the data as far as between stars and commons, but I think there is some information hidden in those numbers.
I been eBay searching for a 1957 Clemente and Koufax for a while, and the numbers certainly show that Clemente supply is way more than the Koufax supply. This lines up with the fact Koufax is an SP and also in the tough mid-series. Just doing a quick search now turns up 185 Clemente and 88 Koufax cards.
Anybody up for a try?
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Working Sets:
Baseball-
T206 SLers - Virginia League (-2)
1952 Topps - low numbers (-1)
1954 Bowman (-5)
1964 Topps Giants auto'd (-2)
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