Hey man, I think you can find some relevant details at www.craftmarketer.com, I did not use the service of that site, but I had an idea to go ahead with those guys to sell my craft work Hope it helps, Anyway, I am going to chk out the sites other two members gave here too, Thanks guys.
What kind of things will you be selling? Let us know when you are set up so we can take a look! Etsy is the site that I know about, too. There is a lot of traffic on it, but I am going to check out the others now.