I think I do not make a major mistake writing that every amateur photographer wants to earn some extra money selling their photographic works. Your presence on my blog and reading this post may be some kind of proof. Nevertheless, that's not a sin to earn extra income from one's own creative work as each art related activity and photography in particular needs money for an artist to be able to create it.
I, like many other artists have tried to sell my works on websites like Fine Art America, RedBubble, etc. The success was rather of mere nature, I must admit. For money earned on that sites I would need to live another 200 years to buy my new dream photo camera. I have no 200 years to live and I am not going to give up my dreams. So, following an old Polish adage saying that the need is the mother of all great invention and discovery, I have invented my own ways of promoting my art, getting wider exposure and I am going to share them with you. First of all,
Define your photography core value and think who may be interested in the kind of work you create