As far as Ebay catering towards buyers. The only thing I can think of is, since the economy crashed I bet there are way more sellers than buyers out there and maybe this is there way of encouraging more buying.....
Collecting ALL 2005 Frank Gore -148/406=36%
Collecting ALL 2006 Vernon davis -129/829=15%
Collecting ALL 2007 Patrick Willis -79/818=9%
Collecting ALL 2005-06 Monta Ellis -86/163=53%