In my experience it varies with location and the girl or even the same girl on different days. Remember, just because the lady offers it you do not have to accept it if the price is not what you consider to be reasonable. Of course these prices are on top of the "massage" fee of $40/30minutes or $70/60 minutes
HJ - 30 to 50
Topless HJ - 50 to 80
Nude HJ - 80 to 120 (120 is the most I've ever laughed at, usual top end seems to be 100)
FS - 150 to 200
Given that, there are privates that do nude HJ for better rates. eg Toya in Willetton is $120 for 60 minutes where she is naked, body slide on your back and HJ and some touching. Pim (recently relocated to Bentley) is $150 for 60 minutes where she is nude, limited touching and HJ. Pim's massage is better than Toya's although some punters find her disinterested. I'd see Pim for just the massage myself.