To my mind the Audiogon community is about sharing our enthusiasm for excellence in sound reproduction with like minded folk. Technical advice is proffered based on experience, in the hope that said advice will help move one step closer to achieving that sonic goal. Equipment is bought and sold on trust, and the vast majority of transactions are positive. That said, problems on both sides of the transaction occur. Most are resolved amicably. That's why I continue to read and learn, and buy used equipment exclusively on Audiogon. It seems to me that audio electronics drop in marketable value from "new" rather quickly, and represent great value used. By all means check the seller's feedback before buying, and engage in some kind of dialogue to get a "feel" for the person. You can learn a lot about someone and the equipment they are selling by spending 5 minutes on the phone with them. Have your questions organized and give the seller time to give you as much information as he or she wishes to impart. Your decision to buy ( or not ) may rest on a comment or something that you hadn't considered. For example, when I went to look at my current speakers, I noted the special care the seller took of all his stereo equipment. He even put on cotton gloves when he moved the speakers! Later I read from the manufacturer's blog that the speakers should perform within specs for 18 to 20 years, with good care. So I figure I got excellent speakers at half price, that will perform beautifully for many years. Much credit for that satisfaction is due to the Audiogon community. As I always say, A-goners are the best. Good luck!