Kostas... The long and short of it is that I think it's okay for people to post eBay listings. I don't want to put words in John's mouth, but I'm guessing that he wanted to simply let others on the list know of an opportunity, which seems neighborly to me. If I run across a "good deal" on eBay that I can't use, I'll share it with the group because I know someone out there can use it.
That's my last word. If you don't like it, put me in your killfile. I've got better things to do. t