@Charly,
if we shoot custom photos and we can use them as well, we sell them just as usual for normal prices. No extra costs. If the customer wants to block the photos and videos for some time, ok - some extra money must be charged.
Our 104 Photographers are always pretty happe to get new ideas for shootings and make sure they are sold already once before the can start.
http://www.skan-media.net