Well, you can't trust most people in this game, period; it can be a very shady business.
“It's a matter of pride to me to get the film done fast, to get it done well. I understand the need for compromise. There is no such thing as a perfect shot, a perfect film. The purpose of film is not to make a monument to oneself.”
“So it is fair enough that you are paying me what I ask for, because it is my name you are using to sell the film. If the producer gives me a guarantee that he will sell the film at a lower price to the distributors, fair enough, then I will charge less!”