One of the best places for cheap eats is Yorma's. It is sort of a cafe/convenice store and is usually in train stations. They serve a few kinds of sausages and a variety of sub sandwiches all for pretty cheap. The sausages with a bun is 2 euros whereas at other places and stands it is usually over 3 euros. Other places for cheap food include kebab and donor places. The cheapest place for pretzels and bakery is a little stand on the right hand side after the entrance of the Marienplatz.