Willing to pay more for a tuner is, at least, determined by the perceived value of an item in certain skewed venues. Hence, you can be reasonably assured you can recover your money if you don't like it or does not fit into your preferences at the moment. Meaning: If Ebay'ers pay much more for certain items than people on Audiogon or other venues or visa versa that does not mean that Ebay should be used as a guage for what an item is worth almost any place else. And sometimes not even remotely close: I am sure many of us listened to the recent Sunday morning broadcast on NPR talking about the guy who sold his whole life's possesions on Ebay including hair clippings, an old standard clay brick, and, if I am recalling correctly, his used underwear. He later went on to write a book about it. Then he made even more money on the book. On the other hand, Ebay can be a great place to buy things that are not on the typical Ebay'ers radar screen and, hence, you can find some really fine values if you pay attention who you are buying from. I truly appreciate the recycling aspect of Audiogon and Ebay rather than a throw away society. You just have to be smart about when is the best time to be in a particular venue.
On a related note: Audiogon's Bluebook service is really a good start in determining value but it should not be the only factor. I commonly pay more from trusted Audiogon'ers or Ebay'ers etc with an extensive positive record and a caring about their equipment. I have had so many really great transactions made with real people. So Regarding venues: Viva la difference (and know there is one)!