have you ever heard of the Mile High collection? I only read the story today but heard about it ages ago when I was a kid collecting comics. Fascinating read- comic shop owner gets a call to haul away treasure trove of "old books" destined for the dump. Tens of thousands of Golden Age comics- every comic book printed from 1937- to the late 40's plus more.
http://www.milehighcomics.com/tales/cbg12.html