Here is a great article on raising your prices.
when I started my business twenty years ago, I came up with a certain minimumâ€ profit I wanted to make. Within a very short time I didn’t feel that profit was enough and I gingerly started to charge more. Then more. I kept stretching and kept raising my profit requirement. NOW THIS IS THE MOST INTERESTING PART: The more I raised my prices, the more I attracted higher paying clients. Each step forward helped me release the fear that I couldn’t get more (or that maybe I wasn’t worth more).