I've been selling my five books on Amazon for as many years. It is a great opportunity to put your work in the marketplace. Getting it noticed is a different matter. I've found advertising on GoodReads to be more productive. It's easy to target my market and keep my ad costs reasonable - you pay only for the response you get.
There are many schools of thought about pricing, and no one can tell you what's going to work best for your work. I've found people who search out my books will pay whatever I charge for them. I've recently dropped the price of my ebooks to try and reach the readers who regularly scan for that price. I haven't seen a real difference in my sales.
I also thought HubPages would generate interest in my work. It has not in spite of many comments on how much hubbers like my writing style. Go figure.