Have you seen the costs to publish an application into OVI store ? The costs are described here: http://discussion.forum.nokia.com/forum/showpost.php?p=606664&postcount=2
Summary:
- OVI store registration: 80USD
- Publisher ID: 200USD (ovi reg+pub ID are fixed, so you need to pay 280USD when starting)
- Signing will vary based on the type of app: Java (200USD), Symbian/Flash (20USD)

So, publish a Java app and you will need to invest … 480USD ! or 300USD for some Symbian app. So, if you have a lot of java app it is better to set a higher price to them.