You know their names as well as you know your own. Wolverine, Storm, Jean Grey or Phoenix, Cyclops — all of the members who make up that feared team of mutants: the X-Men. Ever since they first graced the pages of Marvel Comics in 1963, the X-Men have been one of the most popular series the comic book company developed. More than 75 characters in the Marvel Universe have worn the iconic blue and yellow, and later black, uniform of the X-Men. As a result, the number of X-Men-related items available for fans is innumerable. Starting with the comic books, there are some that are quite valuable. Buyers looking for X-Men comics should consider condition above all else. The best comic books will be in mint condition, safely secured in Mylar or other protective bag, and be in unused condition. Other popular items for fans are X-Men Halloween costumes, which allow children, and adults, to dress as their favorite character. Consumers can search the vast inventory on eBay to find just about every kind of X-Men item they could want, including posters, video games, action figures, DVDs, and much more. You do not have to be a mutant to enjoy the X-Men, but it could not hurt.