In the world of grading comics, there are way too many variables to answer this question without viewing the comics in person. Some of the major flaws to look for: spine roll, spine stress marks, tears, rips, creases, or liquid stains on the cover or the pages. Are there any pages missing, are the staples there and not rusted. Have any of the ads or coupons inside been cut out. All of these factor into the grade, which in turn, determines the worth. Of course there are a few books, that even in poor condition are still quit collectable. Books such as, Action Comics #1, Amazing Fantasy #14, Captain America #1, Amazing Spider-Man #1, Detective Comics #27 and a few others. But these are some of the most sought after books in the collectors world.