Well, it appears that EBay may have screwed the pooch with its recent changes in fees and feedback policy, and its competitors are doing its level best to exploit the current dissatisfaction.
Competitor sites are seeing their business increase by more than 50%, though when one looks at the numbers (less than 10,000 auctions), they are at this point a drop in the bucket compared to EBay.
One wonders if this will blow over, or if EBay will modify its changes in the coming days.