Posted By:
Frank Evanov"Time will tell on the pops. The way it has been the low pops for all sets through the mid 1960s have been getting more difficult and more expensive and they are not coming out of the woodwork."
Sorry to go modern here, but my 1957 Topps Baseball research:
PSA submissions 2004... 2015 cards per month
PSA submissions Jan 2005 -June 2005... 1400 cards per month
PSA submissions July - Sept. 2005....1100 cards per month.
So for 1957 at least, the "woodwork" is drying up.
Frank