I am running the Woothemes Function theme along with WooCommerce and Compare Products Pro to offer up a comparison of items a company sells in their stores, not online therefore I have no pricing on my items. This causes Compare Products to not place the Compare button on the product page. Support for this plugin has a few threads where others have found workarounds but I am unable to get it going. A sample page in my store is here. (I am working on that page now so no telling what settings I might have for Compare etc.
I have all of the lasted updates to wordpress, woo themes, and plugins.