You can set up pages that are published to your domain name that do not show up on your html sitemap. You can tell the Google bots not to crawl this page thereby avoiding the duplicate content issue. What this does is it makes this sales landing page inaccessible to visitors unless they know the specific url page address. The page becomes a ghost page to everyone not knowing the specific page url.
I have used this type of page when I have had established multiple landing pages for testing or to create a landing page very specific and directed to a particular segment of the populous. I have also used this type of page for FAQ's where I do not want the general public accessing the page however I need to provide specific inquirers answers with how to proceed with specific answers to their order processing. Some clickbank marketers will do this with their affiliate page. The page is kept secret from the general public, but is provided to those who have had a need for the information.
This topic was started on Aug 29, 2011 and has been closed due to inactivity. If you want to discuss this topic further, please create a new forum topic.