Created by artist/ co- writer Jack Kirby and writer Stan Lee, the characters first appeared in The X- Men # 1 ( September 1963) and formed one of the most recognizable and successful franchises of Marvel Comics, appearing in numerous books, television shows, films, and video games. Xmen silver comic book. In common with most vintage comic book series, after # 20 the value of X- Men issues falls of sharply. List of the 50 Most Valuable Silver Age Comics. However, there are two 1970s X- Men comics that are worth much more than the issues around them.The X- Men are a team of fictional superheroes appearing in American comic books published by Marvel Comics. Top 50 Most Valuable Silver Age Comics. Get the best deal for X- Men Silver Age Comicsfrom the largest online selection at eBay. Jul 06, · IGComicStore and Gem Mint go live with professional comic book artist Scott Williams who contributed to inking comics such as the 1990' s X- Men 1 and Batman Hush!