THEM: i'd like 3 books, you can have the hats, and also i want one ball  YOU: nope, 1 ball  THEM: i only get one ball?  YOU: yes  THEM: no way  YOU: 2 balls and that is the most i can do  THEM: you'll get all the hats i have  YOU: nope, 2 balls  THEM: no deal  YOU: ok no deal then.