Develop an E-Commerce Web Site

We need an e-commerce web site - somewhat similar to [login to view URL] - that has a reliable Autoresponder, will want to put in E-book program, as well as PayPal program. Will need to have the same functions as above mentioned website - with room to grow as we add a few more products - probably a total of 6 items to sell. We require a reliable, experienced company with conscientious SEO and prompt back up ability. Please make your qualifications and business history available. Thank you.