Action Comics vol. 1 issue #1.
Current Value: The copy in the picture above, assuming that’s actually a first print of Action #1 CGC’d at 9.0 and not a reprint or a photoshop, this comic picture above would be worth 1.6 million dollars.
This is the Holy Grail of comic books. There isn’t a single comic in existence that is more rare or desired. The first appearance of Superman and therefore the creation of the Superhero comic.