Okay, it's actually Action Comics #1 but it is in mint condition and it is Supes origin story. The issue, available to peruse at CGC's certification site, was recently bought at auction for something north of a bazillion elephant bucks. It had to be assessed for auction, just like any work of art, and so you get to have a look to.
It's fasincating to see the really primitive art style and story telling and ponder just how far comics and their grown up graphic novel siblings have come. I used to read a heap when I was kid. I still try to get a few in of a Friday night now, so reading Action #1 is a bit like seeing the first rough outlines of what would be become science fiction in the outlandish novels of the 19th century.