Action Comics #340 CGC 7.0 1966 1264854002 1st app. Parasite For Sale

Any CGC case may have cosmetic imperfections including scuffs, scratches, standard surface wear, minor cracks, or Newton rings. We will not list for sale any slabbed comic with a damaged case that compromises the integrity of the grade.

Cover pencils by Curt Swan, inks by George Klein. Origin and 1st appearance of Parasite in "Power of the Parasite!", script by Jim Shooter, art by Al Plastino; Exposed to radioactive waste, lab worker Jensen becomes the Parasite, who has the ability to absorb energy from all living beings, including Superman. Superman's Pal, Jimmy Olsen ad. "The Supergirl Identity Hunt!", art by Jim Mooney; The Fact Finder, a professional blackmailer, has deduced that Supergirl was once associated with the Midvale Orphanago, and he uses the opportunity of a reunion there to try and figure out her secret identity. Superman centerspread pin-up by Curt Swan. 36 Pages, Full Color. $0.12

This item is a consignment, which means that the price has been set by the consignor rather than by MyComicShop. It is located at our headquarters and ships just as quickly as everything else we carry.

We take pride in our accurate, consistent grading. You can be confident in receiving a well-graded comic when ordering from us.

We understand that condition is important to collectors. We pack your comics with professional care and high-quality packaging to insure your purchase reaches you safely.

We opened our first comic retail store in 1977 and operated a chain of eight comic book stores in the 80s, 90s, and 2000s before going online-only. We are the world's largest comic book seller and the biggest and most trusted comic seller on with over 3.6 million comics sold.

We buy tens of thousands of comics every month from collections large and small, old and new. We also accept consignments and will get your comics listed on for you. Check out our website for more info.

Copyright © 2026 MyComicShop & Lone Star Comics. All rights reserved.