Oakland’s real estate market saw a flurry of activity in the past week, with 75 residential properties changing hands. The most expensive sale was a house in the 7800 block of Hansom Drive, which sold for $3 million. Other notable sales include properties on Cortereal Ave., Huntington Street, Hoover Ave., Greenwood Ave., Masonic Ave., Golden Gate Ave., 62nd Street, Thomas Ave., and Grand View Drive.