I just read a great post on the Intelligent Collector website:
While some of the people interviewed were concerned with the value or authenticity of items purchased, I liked the quotes that emphasized buying what you care about. Shortly after I started the Harvey Mercheum website, I started buying every new Harvey-related item I could find. I quickly ran out of money, and did not even put a dent in the list of items I had found. I now buy items I feel are unique or otherwise important parts of the history of Harvey Comics. In short, I try to buy items that I care about.