If you wish to sell online, you need an ecommerce script. Up until a few years ago this domain was almost exclusive to a few top scripts, but in the recent years new contenders have risen to challenge the title of the ultimate ecommerce script. This wave of newcomers has also included WordPress, one of the best and most flexible scripts out there.
Basically you can use WordPress as an ecommerce script using one of 2 plugins : WP E-Commerce and WooCommerce. Each one of these plugins has a community of developers behind, including theme designers.
Below there are 10 of the most beautiful themes for WooCommerce you can find :