Last year, I got well and thoroughly ripped by several A-gon members when I made a post that pointed out a misleading ad by a dealer. I nevertheless agree strongly with you that we, as fellow audiophiles, need to maintain a level of fairness and integrity in our dealings with one another.
My suggestion is to first contact the person in point and share your concerns. Tell the person that you feel ethically obligated to others who use A-gon to make the truth known. Give the person a fair chance to respond to your E-mail, because it is possible that the person may have another unit for sale, and not the one you sold to this individual.
If the person makes no attempt to be forthcoming and honest about this matter, then I believe you are quite correct to inform your fellow Audiogon readers.
My suggestion is to first contact the person in point and share your concerns. Tell the person that you feel ethically obligated to others who use A-gon to make the truth known. Give the person a fair chance to respond to your E-mail, because it is possible that the person may have another unit for sale, and not the one you sold to this individual.
If the person makes no attempt to be forthcoming and honest about this matter, then I believe you are quite correct to inform your fellow Audiogon readers.