Best CMS For Beginner Making Auction-Based Website

[eluser]Ajaxboy[/eluser]
Maybe you could buy an already established auctions script that only requires mostly html customization and that support development through addons and is template based? If you want that, i'd recommend using Geodesic Solutions (http://geodesicsolutions.com/), how I know its good?, I used to work at that company back in 2008, and it is world leading in classifieds and auction, Hope this helps.