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Hi Christine
I think what I was referring to is very different from saying 'Hey! I have some items for sale. Take a look!'. I have no difficulty with that on the GMB, whether via a website link, an ebay link, or a link in the appropriate sales area. That is not drawing on other people's knowledge to determine the identity or possible value of something. Indeed, if I make a mistake and list a Bacchus on my website as a 'Murano', with a Murano price, I bet someone would snap it up, rather than say 'Do you realise that is a Bacchus?'.
Regarding knowledge - yes, I agree that we should all share knowledge. And I am sure that we all profit by doing so, in one way or another, whether that is obvious in the short term or not. I was not suggesting a rigid scheme that should be policed: I was suggesting something that individuals might feel was appropriate on occasion, in order to help the GMB, given the specific benefits that they have obtained from it.
Alan