A highly responsive, modern and clean HTML5 ecommerce theme that can be used for mobile, fashion, cars, and other related websites. The price is $17 and you can download it from themeforest.com.
This is a WooCommerce template which can be used for camera, computer, gadgets, and other related stores. It is well documented and comes with premium features. The price is $114 and you can download it from templatemonster.com.
A pretty awesome dark blue HTML5 ecommerce theme that has a monochromatic dark background and it comes with calendar, drop down menus, commenting system, and etc. The price is $140 and you can download it from templatemonster.com.
Another free and popular ecommerce HTML5 and CSS3 theme with an elegant and simple look. You can download the template from webdesign.co.uk