National University in California i think it goes for about $900 x class (4.5 quarter hrs = 3 credit hours) and you have one live class per week. Each class is only 4 weeks long.
Almost every class I've had at UIS has had live, synchronous weekly lectures on-line; sometimes they're in correlation with the professor's on-campus course, sometimes only on-line students are in attendance. The professor lectures and on-line students can interact either through their microphone or chat. Attendance is not mandatory and they are recorded for future viewing by those that can't attend.