Expertise on Build a modern looking website that matches the style of the products you sell, but also the design tastes of your customers. Figure out the best selling items you have and matching that with the most searched for items using Google and get those uploaded first. Refine the site and constantly optimize it so it steers people towards making a purchase.
I am having re-designed hundreds of websites in our 5+ years and many being similar to your situation, there are several components to your site which would benefit you greatly. Very well know technologies like WordPress, JavaScript, jQuery, Ajax, HTML5, CSS3, Responsive, Bootstrap, Web Performance and love to implement them to produce feature rich web applications.