I don't know how the dealers move anything at the prices they charge. I also notice many of these high price games stay on ebay etc for months on end and simply don't move.. I guess they hope that every now and again they strick it lucky ripping someone off in the extreme to make it all worthwhile?

My strategy for ebay is watch people (not dealers) list a half dozen times dropping their prices and going nowhere and then contact them directly and do a reasonable deal offline.. Often they are not too impressed as they bought off a dealer and a hugely inflated price originally, but they accept they were ripped off eventually.