To say that George Vlosich can work an Etch-a-sketch is a bit of an understatement. In fact, he has become world famous for his abilities, having been featured in scores of magazine and TV interviews.
You can own a Vlosich original starting at $7,500. George also does paintings and sells signed prints. You can learn more at his website.
Incidentally there are a number of other well known Etch-a-sketch artists. Here are links to a few: