We receive a lot of requests for apartments in Friedrichshain, but they are usually in a lower price range (maximum 1000 Euros). Usually the prospective tenants for these apartments are students or artists. Tenants who are willing to pay a bit more mostly prefer apartments in Mitte or Prenzlauer Berg. High quality apartments are very rarely asked for in Friedrichshain.
Good 1-2 room apartments that are furnished for the younger age group have higher chances of being rented out. As long as they are not located too far east and have a good U- or S-Bahn connection to Mitte, the chances are high for being rented out.