Fellow Photog Folkses, I've tapped a couple to photograph for practicing some techniques and have offered to do it for free. We've been playing tag in terms of pinning down a day for us to meet and then the actual shoot, so we've yet to discuss terms and such. My question is this, at minimum, I will be giving my time for free but want to leave room to sell them on something (i.e., prints, books, framed work, etc.) should the experiment prove positive. While we will thoroughly discuss everything ahead of time, I don't want them to feel as though I took the time to take some great photos of them but that they can't have any of them without paying. However, I do not want to hand over a CD and rob myself of any selling power either. What do you guys think would be an appropriate balance...? That is, how to give them enough to let them feel as though they've walked away with something reasonable for their time yet just enough to get their appetite whet for more. I think this is a little different than doing TFP with models since they're using those prints/digitals to build their portfolio; a couple is potentially interested in so many more things. What's the limit to what you would offer?