I just discovered 20x200, and I think it’s great. It basically is an outlet for artists to sell and buyers to buy limited edition artwork. The best part is the price, which starts at just $20. My current favorite: Lauren DiCioccio’s mylar inkblot prints.
P.S. This is Vogue’s List of Contributors page (so fun). Check out 20x200 to learn more about the artist or to shop around.