THEM: i could really do with like, three balls and two of those hats.  YOU: i will need the book and at least one or two other objects.  THEM: ok, i'll take the book. you can have everything else.  YOU: i liked your initial offer better. how about i get the book and either one hat or one ball?  THEM: you can take the book, but i really can't afford to let you walk with anything else.  YOU: ok, i agree, i will take only the book.  THEM: deal.