I went pick to up a Nikon Fe with 35-70 today for $45 but when I checked it I couldn't see through the view finder. Mirror was up. I couldn't advance the film lever either. The camera is in mint shape except for these two things am i missing something ? The battery was out, does it need the battery? Would that allow the mirror to go down and the film to advance ? Oh and the button to fire the camera was locked or something. Could depress it.