If you’re the potential buyer in a “potentially simple” sales or persuasive transaction and you also want to avoid a negotiation, make sure you too take the trouble to write down, on a piece of paper, exactly why you want to buy the product, proposition or service. Write down how much it’s worth to you. Write down the problems you’re seeking to solve if you are to agree a deal. You too should aim to ask as many questions as possible (he or she who asks most questions controls the sale)