But the reality is that expensive apartments stay on the site longer than cheap apartments. So the "average" prices are likely to be higher than the real average.
It takes some time to find a reasonable apartment however.
I've was apartment-hunting for one month each weekend and finally found a huge $1350 a month studio in Nob Hill (that's nearly the size of a one-bedroom). If you don't have that much time to look for apartments the rent will be much higher of course.