Messages posted by: alpo Forum Index » Profile for alpo » Messages posted by alpo Author Message Comics Main » The comic book value chart » Go to message Hi im new to this site...I'm trying to figure out what the initials mean on top of the value chart under the comic category?? It starts with the letters GD and they end in MT!!! what does each initial mean at the top of the comicbook value chart? Forum Index » Profile for alpo » Messages posted by alpo Go to:  Select a forum Nostomania Main Coins Main Comics Main Comic Book Reviews Magazines Main