Action 521 CGC 9.6 Please look at the photos to make your own assessment as well. Photos are of the actual book for sale. I use the Overstreet comic book grading guide to evaluate my books. 50 per additional comic and. Books will be well packed to insure that they arrive in the same condition as they left. The item "Action Comics 521 CGC 9.6 NM+, 1st Appearance of Vixen (DC 1981)" is in sale since Sunday, June 2, 2019. This item is in the category "Collectibles\Comics\Bronze Age (1970-83)\Superhero\Superman". The seller is "bronzeagebatcave" and is located in Los Gatos, California.