Yes\No. Amazon.com NEVER stocks anything except the 4 configs available boxed at Apple.com, however often you'll see their Marketplace Sellers offering them. If a seller you like is listed, go for it, but I've had enough bad experiences with MarketPlace Sellers (same concept as eBay) that I avoid them like the plague.
...I'm pretty sure that's exactly what I said. onSale even offers Prime shipping.