THEM: hi, i'd like the balls, the hat, and one book  YOU: whoa ; i'd be willing to give you 4 of the 6 items if you let me keep the balls.  THEM: i'd like at least one ball  YOU: unfortunately the balls are my only items of value ; 3 books and 1 hat do not work for you?  THEM: it'd give me quite a low score  YOU: in that case, i believe we're both going to suffer. i'll concede - - i'll take 1 ball, 1 hat ; you get the rest. good luck!  THEM: i'll take your original offer  YOU: which is 2 balls for me? rest for you?  THEM: yes, deal.