Cheap comics to invest in: Wonder Woman vol 2 #9 Cheetah first appearance

Every great hero has a great villain. Batman has Joker, Flash had Reverse Flash, Green Lantern has Sinestro, Aquaman has Black Manta etc. Due to their popularity, many of comics containing their first appearance are quite valuable. So, it makes sense to see if there are any undervalued villains who are nemesis of one of […]