Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
At this point, you will have to look on ebay or Amazon marketplace. Unfortunately the marked up prices are the only option at this point. There is pretty much zero chance any retail stores will still have any in stock. I have seen them new on ebay sell recently in the $375-400USD range. The value I think will only continue to increase, so if you are set on getting a new and sealed, bite the bullet and buy now, I doubt it will get any cheaper, especially with the upcoming holiday shopping. Good luck!
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.