That would really depend on the model and how you intend to use the photographs. If your model is with a talent agency then please consult with the agency and obtain a rate. You would first need to determine the type of photos you are taking, and in which context the photos will likely be used...
Really like this girl whom i've met only a few days ago. Only after adding her to FB did i realise that she was already engaged! So i messaged her and said..."i guess i'm too late".
To which she replied
"ahah!!!yes but I think that we could become very good friend!!I hope so!! have a nice...