In part one of this two-part series, I shared the two main options for selling to or on Amazon.com, as well as walked readers through the benefits of Seller Fulfilled Prime and the steps to make it happen. Critical to all of these decisions and paths is an understanding of Amazon's dominance. As a reminder, Amazon's U.S. e-commerce sales are expected to reach $258 billion this year, up nearly 30 percent from a year ago. Selling to Amazon or on its marketplace are appealing avenues to pursue, but to be successful you need to consider the following: