Maybe you're on a tight budget or just a lucky dude? Why not try to win a ticket - it seems that the festival itself but also some radio stations in northern Europe etc. have plenty of tickets to give away or win.

Post here if you learn of such an opportunity so all forum readers can participate!

I'll start:

Our new rock radio station does a little quiz every morning, and they said they'll give away two RF tickets this week. The quiz is happening each morning at 8:10.
Apply here: http://www.radiobob.de/aktionen/king-of-bob
You will need to be able to speak german, I guess.

Good Luck!