If you held off on getting one from BestBuy.com, Amazon.com is offering an even better Playstation 3 deal. They have both the 20gb ($499.99) and 60gb ($599.99) systems in-stock without any bundles. In addition, except for Kansas, Kentucky, North Dakota, or Washington, sales tax is not charged on your order. Free shipping is also available!

While stores keeping them in-stock is no longer a deal and will become a regular thing, this is likely the best deal (free shipping, no tax) that will be available for a while on the Playstation 3.

20gb Playstation - $499.99 shipped
60gb Playstation - $599.99 shipped (The 60gb version is going in and out of stock so if it is not available right away, it's recommended you check back a few moments later)

-UPDATE- Both are now sold out!