answer: #Person1# bargins for a pair of sunglasses. #Person2# sells the sunglasses to #Person1# with $55 one pair.
documents: #Person1#: Brand new sunglasses just $80.
  #Person2#: Really? They don't look very new.
  #Person1#: These are the latest style from Europe.
  #Person2#: Anyway I just bought some the other day.
  #Person1#: Not like these. OK, just for you. One pair for $70.
  #Person2#: Do they come with a guarantee?
  #Person1#: What do you need a guarantee for? These are really tough.
  #Person2#: I don't know, you can't lower the price at all?
  #Person1#: I don't like to do this, but I guess you can have them for $65.
  #Person2#: Sorry I'm on a tight budget.
  #Person1#: If you buy two, I can let them go for $50 each.
  #Person2#: I'm sorry. I'm not interested. I only want one pair.
  #Person1#: Alright one pair for $55.
  #Person2#: Deal.