It may not pay to be too collegial. I responded a few years ago on this forum to a new member wishing to buy magazines…If memory serves I sold him two at $30 each knowing that they could go for many times that, thinking I guess that I was simply helping another forum member….never heard from him again. I suspect he sold them for much more than he paid. If you sell and don’t really know the buyer, sell at a premium!. …“Fool me once,…..”