This week I want to examine how the census numbers influence the market values between the 9.0 – 9.8 grades (i.e., the “mint” grades). Immediately we’re confronted with three problems.

Recently I bought a very large comic collection. There are thousands of comic books, all from the mid 1940s to the mid 1970s. Nice deep runs of the main Marvel and DC titles are present as are solid runs of Dells and Harveys. There were plenty of keys present including 7 of the big Marvel...