I saw that one is not allowed to post promotional material here. I was wondering how that works for recommendations...for example, a person posted a message asking about coin books. I almost replied with the URL of a seller I patronize who has lots of books at reasonable prices...but I wasn't sure if I was allowed to do that. Also, if someone here, for example, asked about world coins and starting a collection, I would want to tell them to check out coinman's site. Am I allowed to tell them that? Coinman is a registered user, but if he isn't telling them himself... You see where I am going with this I am sure.