Can foreigners buy property in Berlin?
Ownership is set by national law, so Berlin follows the same rules as the rest of Germany. Yes, with no permit and no nationality restriction. Only agricultural and forestry land is restricted, under the Grundstücksverkehrsgesetz. Read the buying guide for Germany
Which parts of Berlin have the most listings?
Most of the published inventory in Berlin sits in Mitte, Friedrichshain-Kreuzberg, Pankow.