What are the current going rates for GIS consultants? I read somewhere that it can range greatly, from $25-$250/hr.

I work for a non-profit and will eventually be making maps for them at a local university. We won't be using anyone's time so there really won't be any billable hours because the lab is open to all students. We won't be using any of their data sets either. The cost will mainly come from printing.

Does anyone have a suggestion as to what a reasonable flat fee might be per map or even per semester or per annum?

I'm in the Midwest, btw.