I would like to suggest certain things:
1. Your products are going below the first fold of the page, which means the products are not readily viewable by visitors and they would have to scroll down to take a first glimpse of the products..
2. It would be nice if you could merge and adjust the contents in the top creamish and green bars, so as to make a little more space. However undoubtedly you will have to be careful while making these changes as to maintain the attractiveness of your site.
3. You need to do some SEO for making your pages ranked higher in SERPs for keywords related to your category of sites.
4. You can also do somethings like submitting your site to social bookmarking sites like digg, stumble upon, delicious etc. and do some tricks to increase traffic to your site.
I think the above things should be helpful for you to attract traffic to your site and when your site has high traffic, I feel your issue of low sales would get solved gradually..
