THEM: i would like 1 of each item  YOU: i can part with the hat and a book - that gives me both balls and a book  THEM: i will take the hat and 1 ball and give you both books and 1 ball  YOU: doesnt work for me... best i can do is both balls for me, all else for you  THEM: sorry i sense that will be a very bad deal for me.. i need 1 ball and the hat you can take the rest  YOU: not great but ill do that  THEM: ok deal.