THEM: i would like the hats  YOU: i would like the hats too. would you be interested in the book and 1 ball?  THEM: i only need the hats. you can have everything else.  YOU: sorry, i would need at least 1 hat to make a deal.  THEM: i can not do anything without the hats.  YOU: i understand. no deal then  THEM: no deal.  YOU: agreed. no deal.