The Leica II's are outstanding cameras, but they do not have slow speeds (below 1/30). That's not a huge limitation and there are shutter timers available (I hear). I personally think there is something special about the build quality of the IIf - perhaps the surviving examples just saw less use so it appears that way! About $300 for a really good IIf is the market price. All that said, a Leica III of any suffix is a fine camera, with very reliable slow speeds and all, if properly serviced.