Microsoft has very clearly listed this here – http://technet.microsoft.com/en-us/library/cc262787.aspx
just started of my very first Production SharePoint 2013 Deployment and suddenly got an Error saying that “Setup could not find any available products to install SharePoint 2013” when I ran the setup. All Prerequisites are perfectly gone and tried again to run by logging as local admin but still issue persists.
can remember that I had an same kind of a issue on installing Office 2013 first time and it was because of corrupted installer.
so guessed it would be same here, got the whole setup copied newly and then ran again, yes it worked !!