This may have something to do with it:

htp://www.smh.com.au/news/technology/ebay-fined-over-counterfeit-goods/2008/06/05/1212258942844.html (add a "t", board upgrade apparently hasn't solved the hyperlinking issue)

It goes to show that eBay does have the power to stop counterfeiters, but until jow simply hasn't had the will.