Berlin is an extremely cheap place even though some don´t think so. Maybe during a weeklong stay, I ate kebabs a few times but they cost half of what they do in Spain and were twice as large. When I'm traveling I can not afford the frills and finding food places at these prices is a joy. Pizza Dach was the best place I found during my week there. It's an establishment that sells Turkish salads, pizzas, pasta and Turkish food. Best of all is their prices and their schedule (24 hours). The best way to get there is to take the U-Bahn to Frankfurter Toe or you can go to B-Bahn, U-Bahn or Tram from Warschauer Straße.