answer: #Person1# thinks the old books are valuable to collectors while #Person2# thinks they have sentimental value for #Person2#.
documents: #Person1#: Wow, look at all these old books on this shelf. They've got to be at least one hundred years old. I'll bet they're worth a lot to collectors.
  #Person2#: Well. They've got a lot of sentimental value for me, and that's all about it.