Like any other major European city, Berlin offers a wide variety of accommodation at widely varying costs.
On the low end you can find several campsites and youth hostels. Not as common but also available are bed&breakfast places. If you plan to stay for a longer period you might want to have a look at the Mitwohnzentralen. These are agencies which rent-out private flats for periods from one month to a year or even longer. Finding an affordable... more