Last year I got into a bidding war on ebay for a character that looked great and was unique. The seller was happy and surprised to see his puppet sell for a good price. Several things worked in his favor: he avoided flooding the market (only listed one puppet at a time), he used multiple photos to show how expressive the puppet can be, and he simply built a good looking puppet.
So ... while it's true that ebay is often the hunting ground of people looking for bargains, I have been willing to spend above average dollars for a good item.