I know this gets asked on a regular basis but it is a first time for me... I was emailed today by an agency that does exhibits and they found a insect photo by me that was posted a couple of places. It's not a real common insect, but it seems to be want they want. They are doing an exhibit for a national park and would like to license my photo. So I said, sure, I would be interested in talking to them. I'll probably hear back tomorrow.
NOW WHAT? I have never sold a photo before or even tried too. If they were a nonprofit I would just give them the rights to use the photo but since they are a hired company, it seems like I should charge something? What do I say to sound 'professional'? (Actually, I am one of those dreaded amateurs that is so thrilled to have someone actually want one of my pictures that the money is not really important...)
Any advice?

