As a software developer, I've often wrestled with the decision of how much to price my creation. I remember watching my grandfather create a large, beautiful watercolor painting and then stick a price tag of $10,000 on it. When asked how he could justify $10k in 3 hours his answer was it took him 40 years + 3 hours. That makes sense.

It would be nice if this would apply to software development, because I'd be at 20 years mark!. Since it doesn't work that way, try reading this article on how to compute a price, all the time keeping your revenue in mind.