Actually I have seen sites sell for all kinds of money.
Sometimes there is a healthy, professionally prepared expansion plan that can mean a lot more money. Sometimes the site comes with one huge account, sometimes with many small ones. This can affect the price. Sometimes they come without accounts.
The type and source of traffic will also affect price, depending on the buyer’s experience and plans.
Basically, a site is worth what someone will pay for it.
I think wufu will see some more action when the auction nears closing.