Help finding every Superman comic?

Hello, I am wanting to get into comic books, and I would like to know where I could buy every issue of Superman. Superman (the original) and then every other story arc/series afterwords. I am not looking for original or rare copies, just reprints will do. I have no idea what the price range on this is, but I know it will be expensive. Can anyone give an estimate as well as a location to buy them at? Preferably a website