Amazon is offering these leather Kindle cases today for $14.95. They come in several different colors and shipping is free with AmazonMom/Prime or a $25 order.
I am always on the lookout for good deals on cases for various electronics and the problem I find is that the reviews are really bad on many products.
In this case, it looks like the reviews are excellent. This one is designed for the Kindle 3. You can get the details about this here– the blue one is priced at $14.95 and the other colors are up to $1 more. You can see the other colors available here– make sure you are getting the correct color by double checking the title of item. It should say Sky Blue, Red, Hot Pink etc… when you click on it.