Your lack of faith in other human beings is quite revealing. Someone must have screwed you royally. For those who requested it, I sent my feedback info from Audiogon and eBay. They at least made the effort to find out what is going on BEFORE they formed an opinion.
As for pricing, I am trying a new paradigm of pricing including shipping and Paypal. I set my prices low enough to cover costs, gain interest and close to what I expect to recieve. So far this has been successful.
If sellers would realize that in the end very few buyers pay top dollar for goods, especially in these difficult economic times. If you accept that time has a money value, a quick sale at a somewhat lower price ultimately results in more value to the seller because the seller has use of the money sooner. This is what I do when I sell surplus equipment.