You're looking for some really cheap work here. With travel costs, I'm practically working free with this bid.
Also, the details are pretty light. I'm assuming right now that it involves traveling to Princeton, taking the pictures (possibly with pose instruction, etc), and mild touch up (correct color/exposure, crop, etc). Digital delivery with mutual rights (I retain the right to use the photo to promote my work, you get unlimited rights to it).
If you're looking for fancier touch up, that's outside the scope of this bid.