eStore by ElegantThemes – Beautiful design, easy to configure, and has integration options with some of the most popular e-commerce plugins, including eShop and Simple PayPal Shopping cart.
Price: $39/year for all Elegant themes
Emporium by Templatic
A complete eCommerce solution that includes: Product Management, Order Management, Shipping Options, Multiple Payment Gateways, Tax Management, Built in multiple product image upload and much more.
Price: $65 for a single license, $99 for a single theme with unlimited licenses, $299 for all Templatic themes
Templatics also offers other e-Commerce theme, all with similar features: