You can now buy a 20GB PS3 from GameStop.com for $450 (in case you just click on random stories without reading titles).
According to the selling page, they are currently still in stock.
For those that don’t need a big hard drive, I would personally recommend saving the $50 and buying a game with it instead. I’m still wishing I could have returned my PS3 and saved $150.
You can only buy 1 console per household, and orders are shipped on a first-come first-serve basis. You also receive 5 free Blu-Ray movies by mail if you buy a PS3 between now and September 30th. You owe me one, GameStop.