It's really weird, I dont know where people get their guides on prices from.. probably from planet cookey cookey land or sommat..
I've seen one of those sell carded for less..
The geniune CGI figure isn't a custom.. let me at least say that the figure does exist. The pictures and the figure in this auction look kosher, but i've no idea why it's so expensive when loose.. maybe the seller is trying his luck, after all it is ebay.