Those stores surely are greedy, as the official MS statement claims the Arcade at $199, the remaining Pro's at $249 and the Elite at $299.
http://www.xbox.com/en-US/press/2009/0827-pricedrop.htm
quote: "On top of that, the Xbox 360 Pro console will now be priced at $249.99, reflecting a price reduction of $50, while supplies last. Starting at just $199.99 for the Xbox 360 Arcade console..."