A small museum recently contacted me about using one of my interactive Flash pieces as a kiosk element in one of their exhibits.

The Flash application would be a standalone projector that runs on one computer, corresponding to a specfic exhibit, in the museum.

I am trying to decide whether my licensing fee should be similar to amounts one pays for consumer oriented software ($25 - $50), or that the fee should be higher because this is a special public use, and will apparently add quality to their exhibit.

Anyone have experience with this sort of thing?
In addition to rates, what other issues issues should I be concerned about?