Are these people walking around saying - "I really want this thing that I can find in used camera shops all over the country, but I won't buy it because they don't charge enough?"

I think that many of them are hoping for that one-in-a-million deal. While this may be a pipe dream in the 35mm section, its not that rare of a possibility on the Large Format section of Ebay. Just his week, I got my second good deal on a Commercial Ektar at $200 to $300 less than Ive seen similar samples priced at camera stores. For the most part, bidders and sellers seem to be a little more realistic and level-headed in the LF section  except for few morons who list items at outrageous stating bids, with one line descriptions, and no picture, over and over, week after week and dont get bid one!

Know what you want, know what its worth, know and stick to your limits.