Mandarake is one of the biggest shops for buying used manga, anime, toys and cel artwork in Tokyo. There are two or three locations (Akihabara, Nakano and I think there's still one in Shibuya). The Mandarake in Akihabara is just a 5 minute walk from my office. The below picture is of their display window. Not sure what this has to do with manga, but I guess everyone needs an anatomy refresher now and again.