One story:

I was selling a musical instrument. Someone asked me the question, "Is this a good beginner instrument?" Thinking it might be for a kid, I gave an exhaustive answer, then when I learned it was for her, an adult, I gave her my experience with instruments and my perspective. At the end she told me she was interested because her partner was a BAND LEADER and when she went to the concerts she was fascinated by this instrument. But here was she was, interrogating a random seller who didn´t even play the instrument in question. And, at the end, of course, she wasn´t interested in buying it.