answer: #Person1# buys a desk from #Person2# and thinks it's cheap.
documents: #Person1#: I have read your notice on the wall so I come to see if there is anything I need. 
  #Person2#: Well take your time. There are so many things to sell. 
  #Person1#: How much is the desk? 
  #Person2#: $7. 
  #Person1#: The goods in the yard sale are really cheap. I will take it.