There are many things that are the same as selling offline. But many are different. Unlike the offline world, a potential buyer does not get to see your work in person. They do not see you in person. But that doesnt mean that selling art online is harder. In some ways it is easier. This is a very broad subject to cover in one sitting. But if you remember to use the following tips you are guaranteed a leg up.
Be completely honest about the work that you are presenting for online sales. An art purchase is a very emotional buy. It is almost at the same level as buying a house or a car. Of course the potential buyer has to feel an emotional attachment to the piece if they are going to purchase it- this is not the place to create that. If a buyer is emotionally attached enough to the piece to buy it and then receives something that was not exactly as expected- your buyer will be unhappy and probably ask for their money back. If not I guarantee they will not be buying any additional art pieces from you. You cant risk this because someone who collects art is just that- a collector. Future purchases are highly probable. Make sure they know exactly what to expect. Be honest about...