WordPress Digital Download Store Setup

I need a complete WordPress site configured to sell downloadable GPL themes, software and e-books. The build has to feel professional from day one, so I want a theme that gives me a fully customizable layout, has e-commerce handled out of the box and is already tuned for solid SEO... (Budget: ₹2500 - ₹5000 INR, Jobs: eCommerce, HTML, Payment Gateway Integration, PHP, Website Optimization, WooCommerce, WordPress, WordPress Design)