One-Product E-commerce Website Development

I need a simple yet effective website to sell a single product directly online. This product is a therapy ball for pain relief from minor aches. It is designed for the spine and low back, in particular, and is easy to use and effective... (Budget: $250 - $750 USD, Jobs: eCommerce, Graphic Design, Payment Gateway Integration, UI / User Interface, User Interface / IA, Web Design, Web Development, Website Design)