Open Question: As a visual artist-- what concerns do you have in regards to exhibiting and selling your artwork online?

Open Question: As a visual artist-- what concerns do you have in regards to exhibiting and selling your artwork online? Have you had any overly positive or negative experiences in regards to exhibiting or selling artwork online? Do you have any advice about selling original artwork online? Where do you prefer to 'exhibit' your art online? Do you feel that the Internet is changing the 'landscape