Facebook will be adding more “BUY” buttons to ads and product pages created on the Shopify e-commerce platform.  Users should carefully use these resources with safe security practices in mind 

http://www.pcmag.com/article2/0,2817,2485814,00.asp

Launched less than a year ago, the Buy button lets consumers purchase products through the News Feed or Pages without leaving Facebook. Shopify, a platform that helps businesses create an online presence, has helped several of its clients incorporate the Buy button over the last few months, but is now opening the program to more retailers.

Shopify will begin inviting certain merchants to “Add Facebook” to their account; invitations will appear on the Shopify account home screen over the next few weeks. Once synced with the new Facebook sales channel, users can post products with the “Buy” button, as well as promote posts with paid ads, and manage customers and orders from Facebook.   The call-to-action button is not yet available to all Shopify customers; those still waiting for an invitation can sign up online for updates and submit a request to join the beta test.