The greatest thing about eBay is that anyone can buy or sell any (reasonable) thing for fair market value. Every seller of a given widget is equal in the listings - big or small, fulltime or moonlighting, lots of the same widget or only one, the only sort criteria is time of auction end. Good or bad individual sellers and buyers are easy to spot due to the feedback system, which goes both ways, thereby ensuring that everyone is equal on both ends of the business transaction and that everyone will strive to be honest while their reputations are at stake. Final prices - driven as they are in auction format - are based on actual supply and demand, not what the widget maker (or group of middlemen) decides by fiat. It makes eBay a useful place to research actual fair market values. It makes eBay a great model of a working free market.
Well, all of that might soon be going away. Because eBay fears declining traffic through the site, they want to enact some new policies that will reward the established bigtime power sellers while punishing the small and new. Any community, large or small, needs to have a constant flow of new people coming in with new ideas and fresh perspectives; otherwise it grows stale and dies. They also want to enact policies that will upset the balances of feedback and transaction power in favor of the buyer. Lack of transparency is bad.
The above linked seller thinks that if eBay wants to increase traffic, they should be doing the opposite of what they plan - reward new sellers to encourage them to come into the community. Me personally, I think they should leave it alone and not try to fix what isn't broken; something might be broken somewhere, but it's not where they're looking.
On a related but tangential note, there's also some free market in action occurring between websites and coders. ScriptLance is a great place to get coding jobs, great or small, and be completely anonymous on both ends. Who you are isn't important, only what you can do is important. Payment is done via a very fair escrow system. I'm kind of hoping something like that will appear for freelance writing jobs too.