Let's hope mom didn't throw out your comic books along with the baseball cards. If she did, pray there wasn't a Superman No. 1 in the pile. If there was, you could have been a millionaire. In March 2010, a mint copy of Action Comics No. 1, the debut of Superman, sold at auction for $1.5 million. The comic was in pristine condition. It was squirreled away for 50 years inside a movie magazine [source: cnn.com].
Why are comic books such a good investment? Back in the day, kids read comic books and generally tossed them in the trash or shared them with a buddy. Very few survived. As the years passed, people began placing a value on comics. Condition and scarcity hugely impact the comic book market. Missing pages, loose centerfolds and other defects will devalue a comic book, as will page quality. Comic books that mark the first appearance of a popular character are pricey, as are comic books with important storylines.