You've made sure your book is listed on Amazon.com because everyone in the writing and author promotion fields say that you must. So what's the big deal? You've actually made more sales to family and friends on your own. But why stop there? Sell your book to the whole world through Amazon and reap the benefits of their monster publicity machine.
There's may be a good reason you're not selling many books through your Amazon sales page. You probably don't know how to work Amazon. Once your book is published there do you just let it sit while waiting for sales that never seem to come?
You will learn how to work Amazon for all its worth in Aggie Villanueva's book, Amazon Categories Create Best Sellers."