Moral of the story. True sales professionals know that in order to succeed at sales you must be a master at negotiations. Sometimes the final stages of negotiations come down to a mere contest of will. If you find yourself in such a situation, just read the writing on the wall.
"If you look at how long the Earth has been here, we're living in the blink of an eye. So, whatever it is you want to do, you go out and do it." - Jamie Foxx