This is a pretty good size Drupal 6 project with an international store built using Ubercart and an interface to salesforce. The site gets a fair amount of traffic and serves a spiritual network of individuals and small faith communities committed to living the contemplative dimension of the Gospel. There are over 120 chapters in 39 countries. This site was originally running on a different platform and Drupal was able to serve their needs far better with easy content changes and a consolidated store. Visitors can purchase materials as well as watch online videos and there is also a mailchimp component for receiving newsletters and other communications. There are an extensive set of custom reports that the administration uses to track activity.