Got a spare few million dollars just hanging around? Well, that rainy day fund could go towards Action Comics #1, the single most valuable comic around. What makes it so special? It's the first appearance of Superman and the comic that started everything.
Around only 50 to 100 copies still remain and one of them is up for grabs on Ebay. It's in great condition, which is why the current bid stands at almost $2million. It's quite the investment, but if you've got the money then why the hell not.