If you do, then you could make a fair bit of money doing it.
Sites like DeviantArt allow you to make money by opening up your own online shop and selling paintings, drawings, photos, scetches, and any general masterpieces to the world!
It's fairly easy to set up and it's free, so why not give it a go. Mind you, there are some very nice pieces on there.
But its worth a try and you define the price you want to sell for.