I bought a case from an eBay store for 11.99 with free Priority Mail shipping (US). It's fake leather (he had real leather for $19.99, if I recall). It's actually a lot nicer than I expected for the price. It looks a lot like this one:
(I was going to use the image from the listing but it won't work so I found one that was close.) It's all the protection I need, it feels nice in my hands and the price was definitely right. If I ever start doing leatherwork again I'll probably make my own but that's a project for waaay down the road.
CW