Well, there are a few pages that are accessible only from one or two other pages. What you need is a nice navigation bar that will allow users to access every page from every other page. You should also have a published Privacy Policy and a Terms of Use page which ensures prospective buyers that their personal data is safe with you. Perhaps you could also include an About Us page with information on your business' history, mission and goals and the like. Anything you can do to make your site more appealing and easier to use is a plus.