The prices of software space a lot: from 1€ on markets like Google Play to 35$ of software like DisplayFusion, RegexBuddy, PowerGrep, Evernote going to some hundreds of euro (Resharper, Ndepend) and arriving to some thousand of euro (Toad, Visual Studio Ultimate).
In economy we study that it's not only a matter of costs of research and production. The pricing of products can be regulated by the Marshallian and Walrasian model of pricing.
However my knowledge of economy are very limited and I wonder if it could be a winning choice for small companies like the one which sell DisplayFusion, RegexBuddy and so on to sell their products for very cheap prices. Especially to private customers.