Wappos is a theme by k.maruyama to make the e-commerce site by WordPress. You can change background image/color and header logo from WordPress admin panel. SEO optimized, multiple widget-ready placement, custom menu, threaded-comments and valid XHTML 1.0 Transitional.
Requires WordPress version 3.0+
Electronic commerce, commonly known as e-commerce or eCommerce, consists of the buying and selling of products or services over electronic systems such as the Internet and other computer networks.
Download and info: http://wordpress.org/extend/themes/wappos