If you are looking for webdesign comments, I would say there are alot to be done. Reasons are as below.
1) This is a typical oscommerce template which many are using or equivalent. There is no different from yours compared to the others. Thus, this do not make your viewers remember your site as much as you want them to be.
2) Many of your products photos are abit dark and makes it hard to view the items. In this, you lose potential buyers for those products.
3) You have a decent header but I would say align it centre will make a better effect.
4) Your words in your introduction: Small and plain. This does not capture the attention of your viewers to see what you are selling and what message you want to convery.
These might be some of the points that you might look into. There are many more points i believe others might have spotted. So I shall leave it to the rest to comment.
If you need professional designing of oscommerce templates, you may pm me for more ideas and suggestions.
And the header looks like it lost some quality somewhere along the way too.
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