From the most basic shopping cart experience to an elaborate bidding system, Webdrips will help you meet your site's commerce needs. We do this by sitting down with you and carefully creating a data model and workflow that matches your expected end user experience. For Drupal 6 sites, there's Ubercart(link is external), and for Drupal 7, we have the choice of Ubercart or Drupal Commerce(link is external). We're happy to work with either shopping cart system.
Both cart systems support multiple payment methods, notifications, and a multitude of other features. In fact, Drupal Commerce has nearly 500 add-on modules(link is external) to extend the shopping cart concept. At Webdrips, we've built shopping experiences that are based entirely on exchanging real currency for "points", bidding systems where retailers are notified via email if their bid has been beat, and other complex flows.