I want to suggest you Kosmic multi purpose Wordpress theme.
This eCommerce theme is very simple, clean and professional.
It has a lot of features which you require to beat global competition. A feature such as elegant and exploring design which help to attract online users, you can enable to create customized design by using custom widget.
Features are mentioned below:
1. Fully responcive
2. Cross browser compatible
3. in built custome widget
4. Ajax shopping cart etc.
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