Interview the interviewer:

The applicant who will take anything offered is unlikely to win any but the most temporary of positions. A competent interviewer (there are some) will respect your efforts to assess the organization and the position in terms of whether or not it meets YOUR requirements. And you owe it to yourself to have defined before hand, what you ideally want and what you are willing to settle for, under certain conditions. For example, you might really want a salary of $75,000 to begin with, but you'd be willing to take less if the opportunities for growth are clearly in the picture.

From: http://topten.org/public/AB/AB8.html