As an artist myself, I can recommend a great site for selling your art, your own personal website. check mine out
http://www.metalartist.co.uk/ and yours can be similar for very little cost, starting from �20.00 whilst mine is mostly Runes at present, I am about to start putting my other metal art on there. Make contact through my website, the guy is very helpful, mention my name to him I am known to him as the: metalartist. he really is a great guy and will be a great asset to you as he has been to me.