I once went to an Art History lecture, it was interesting and well presented. During this event they raffled off a poster, and my ticket was drawn, I was told to stop by the Gallery later to receive it. When I stopped by that evening to pick up the poster that I had won, they told me that the poster that I thought that I was to receive was the ship's copy, and that they would send me an identical one if I paid the shipping cost. There was nothing special about this poster, yes I would take it if it was free, but I wouldn't pay for a copy.