With little information on key elements to negotiate without having had the experience of the Batmobile, I take time to read the case of Sally and understand what it is that from my point of view can be obtained, that is basically what price seems reasonable that Sally can act in the play, which for me is, at least at the same price it would cost to hire the first second voice (24,000 euros). Negocación I start thinking that the singer will try to get twice what it charges a second voice and with that prejudice, my only goal is to close the deal at the price of the second. Big mistake! I myself have put the limit....thank you.