It appears that the Radeon HD 4850 cards are selling all over the place, first it was Hong Kong, then in Germany and now in the U.S. A company called FX video cards is selling Sapphire-branded Radeon HD 4850 cards and still has a few left if you want to snap one up.
The cards are pure reference design and it's the lite retail versions, i.e. no game bundle and just the most basic of accessories come with the card. Sapphire's part number for these cards is 100242L.
There's no mention of clock speeds of any kind, but there's a picture of the card with a nice Sapphire sticker on it. Price-wise, these are a steal at US$189.99 (€122/£97), plus $8.99 for delivery and, of course, sales tax where applicable.
According to the comments, some people have bought several cards and are planning to sell them on eBay, so you might want to hurry up if you want one of these cards.
You can place your order
here.