If you are looking for buying advice, this is the place. A friendly, helpful, knowledgeable group of people. There are no "lurking" diamond sellers... yes, there are some tradespeople who offer technical advice, but they are clearly identified and are not allowed to "sell" on the forums.
I have bought several diamonds after consulting with people here and have gotten top quality stones at the best prices that my local jewelers could not match either in price OR quality.