i have sold a fair few on my site although i tend to use it more as a online portfolio... i sell more through agencies and galleries than i do from my site... when using agency sites bare in mind the more varied photos you have on their sites the more chance you have of selling your images! Never be afraid to ask shops and the tourist board etc if they would be interested in using your work... i also have some of my images sell through the rspca etc .... when setting up on your own its a good idea to have a pen and paper to hand all the time and jot notes down as ideas pop into your head.. and google searches are handy! the best agnecies on the net are photographers direct.. alamy... and many more try and stay away from micro stock sites who pay little for your work they de value photographers.
a good place to start is to work your way through this google search ..
photography agencies - Google Search
bare in mind the bigger agencies will not touch you if you use micro stock sites

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