1-Customize
2-Store locator
3-Mailing list
4-Wish list
5-Ads
6-support many languages (e-commerce with Arabic)
7-Migration data to other language (from PHP to ASP) also (MySQL to SQL server)
8-Support ( maintenance - the maintenance price - the method of contacting ex. Email)
9-Upgrades
Don't buy it! Joomla and VirtueMart are open source and free to use. If your language is not in the core language files it is easy to add it.