Check Out These Helpful Guides. Vintage Marvel Comics Fan Clubs. Save Your Super Hero Collectibles From Danger! The Marvel Value Stamp And How It Might Have STUCK You! What makes this poster great is that it provides an image of how a convention looked almost 50 years ago: It still looks the same except for the admission prices! This is approximately 23 x 29 inches and printed on thick stock chit board. It is in Very Fine condition due to some corner creases and storage wear. Check out my other auctions for more vintage Marvel Comics superhero collectibles. Spider-Man Discovered in the 1950’s. The item “Rare 1972 Marvel Comics Sergio Aragones Convention Poster Marvelmania” is in sale since Monday, January 02, 2017. This item is in the category “Collectibles\Comics\Posters”. The seller is “tellshiar” and is located in United States. This item can be shipped to United States.