If a person is not knowledgable with what they are buying, wouldn't they seek professional opinions from someone they know. This is what we do in everyday life, ie. real estate transactions(comps in the same area). Bob being a GOOD GUY DID NOT TAKE THIS PERSONS $$ . How many other EBAY people can you say that for. He was expecting the audience to be knowledgable. You cannot fault him for someone else's lack of knowledge. If we read between the lines. He did the right thing.