I could not give comment in your particular case not knowing the content and tone of the PM your talking about. However, If someone knowledgeable in the appraisal of the sale item could advise a seller in a respectful manor that they may want to reconsider their asking price on something, I feel it could be off service to them. Some people really don't have a clue how to price some items and are wasting their time and ours by asking way too much. For instance, I would not be personally offended if I was advertising my S&W .38sp, Model 60 for $500 and someone were to PM me stating that the Blue Book of Gun Values shows an average resale of $350 for my gun and that I may want to rethink my asking price if I realy want to sell it.