Fine Art America is the world's most powerful sales and marketing tool for photographers and visual artists.
Simply open an account, upload your images, set your prices for all our available products, and you're instantly in business! FAA provides you with an e-commerce website, fulfills your orders for you, and sends you your profits each month.
it's not a matter of where, it's who. many think that all they have to do is post on twitter and people will see it. but if they have no followers, not many will see it. make a blog, upload to another site, etc, anywhere people can see you. be sure to add descriptions to your work - because thats a form of advertising too.