Well, to be honest, I dont see any harm in asking. He offered to buy and he posted in the correct sub-forum. If anyone lets go of a valuable magazine for a few bucks, then its just as much their fault for not researching what they are selling.
Even in the link Flyman posted I cant see a problem. Looks like he is collecting these, like the coins and stamps he mentioned having. So, if anyone has these and are willing to sell, then sell them. Just make sure the money is good before you ship them out.