Its different though, xbox was on sell during the christmas season and everybody knew there would be a shortage becasue microsoft was idiots and tried to rush the release to fit in the shopping season.
sony is supposed to be able to meet demand, because htey dont want to be in the same spot microsft was so I doubt their will be a big ebay market for them because they should be readily available and esp if they sell it at that price, there will be a ton of them availabke.