For most of their history, comic books had been priced at a dime. Oh, there were Nickel Comics, and the annuals were generally priced at a quarter, but these were definitely exceptions to the rule. Not that there hadn't been inflation anyway; that dime bought you a 68-page mag in 1940, a 60-pager in 1944, a 52-pager in 1950, and a 36-page issue by the time the Silver Age started.
via sacomics.blogspot.com. Read the whole thing.