What makes a comic book valuable?
The value of a comic book is also one of these things that sometimes you cant tell from one day to the next. It may be that there was something special about that book, such as the debut issue of Superman, Action Comics, for the first time ever. That's a rare comic. Perhaps, there are not that many comics of that issue that still exist, or it might have been a character that all of a sudden became popular years later, because they were featured in a film, like The Punisher in Spiderman that everyone knows about. The Punisher, who became very popular in the 1980s was a character that was created in the 1970s, in Spiderman # 129, and it was never that popular or that expensive until it happened upon years later. Again this happened with the Silver Surfer which is now popular in the latest Fantastic Four film. Silver Surfer was created back in about 1966, but was it valuable and recognized at the time? Sure, but over the time, as it's popularity has grown, through different generations, that comic has seen it's value gone up and sometimes gone down as it's interest has waned. So, you have to be able to focus on certain types of books, and choose; sometimes roll the dice. Do you want to pick a comic book character that you know is valuable, such as Superman, or do you want to roll the dice on a particular character, on a new comic book character, that you're hoping will pick up in value as time goes on.