First appearance

In comic books and other stories with a long history, first appearance refers to the first occurrence to feature a fictional character.

Monetary value of first appearance issues

First appearances of popular characters are among the most valuable comic books in existence. Of the "ten most valuable comic books" listed in the spring 2002 issue of The Overstreet Comic Book Price Guide, seven are first appearances of popular superheroes. (Another, Marvel Comics #1 (October 1939), is the first appearance of the Golden Age Human Torch but is most noteworthy as the first comic book published by industry giant Marvel Comics).

By the time a character becomes iconic, many years have passed since his or her first appearance and few copies, and fewer good-conditioned copies, remain. These comic books may be worth thousands of dollars. In 2004, a copy of Flash Comics #1 (January 1940), the first appearance of The Flash, was auctioned for $42,000 and a copy of Captain America Comics #1 (March 1941), the first appearance of Captain America sold for $64,400. In 2010, another copy of Flash Comics #1 sold privately for $450,000.