tangor - 11:20 pm on Jan 4, 2012 (gmt 0)
Last thought, Planet13, 301 from your "big hits page" to the ecommerce page which is updated to be the combined page, don't change any page titles or introduce a new page title! Keep what you already have and redirect the other.
No search engine worth their salt ever FORGETS any URL they have met. What you want to do now is redirect a "retired" page to the page that replaces it... and that page already exists. You don't want to lose anything you've already acquired.