THEM: can i get the hats and the books?  YOU: i was hoping for the hats and the ball. the books have no value for me, so you should take them for sure.  THEM: i will take them, and you can have the ball. but i need the hats  YOU: i can't do a deal without any of the hats.  THEM: neither can i without all the hats  YOU: then no deal  THEM: no deal  YOU: no deal  THEM: no deal  YOU: no deal.