Did you know about VirtueMart??, ..that is the best Open Souce E-Commerce solution at this moment to set up a virtual online store on the internet based on Joomla!. JoomlaShack will donate $200 to the VirtueMart Project as being awarded with the First Prize for the best Joomla! extension.
VirtueMart is the leading Online-Shop solution for Joomla! (more than 1.5 Million downloads so far).
VirtueMart is free! You can download, use and modify it without any restrictions (License: GNU/GPL) - just as Joomla.
VirtueMart is no stand-alone script, but a Plug-in and requires the PHP Content Management System Joomla!. So you must install Joomla first, then VirtueMart. The easiest way is to install the Joomla! eCommerce Edition: a ready-steady-go bundle of Joomla! & a pre-installed VirtueMart. A lot of translations are available: addtional language files can be found in the Language Pack.