Check your Web site regularly, at least three times daily. Fill orders fast. Act like a UPS driver hustling to make quota, not someone who couldn't care less. Note that this one ranked last. Even though price is a consideration in every purchase, it is not the most important.
Customers expect to get a lower price on the Web.
However, the price has to be supported with the elements listed above in order to be successful. Without these features, your e-commerce won't get off the ground. The world is changing. E-commerce is not a passing fad. Billions are being made and will be made there.