The Overstreet Comic Book Price Guide 43rd Edition (2013/2014) Digital Download Edition is now available for download here. The digital edition is compatible with both the PC and Mac. The Overstreet Guide is consider the bible of the industry and is an essential for comic book research and value guidance.
You can see my review of the last edition of the comic book price guide here, and the video also helps you decide whether or not you should pick up a copy.