Often times,with diligent searching on a college's greek life website, or in the greek recruitment guide distributed prior to recruitment (in the summer for fall rush), costs are listed. It may take some digging.
You could also contact the greek life office and ask for the high and low sorority costs- I imagine that you would not have to identify yourself.
For instance, the costs of each chapter at FSU are listed in the 2013 recruitment guide here (financial info. is on page 10):
http://greeklife.fsu.edu/Current-Mem...To-Recruitment
