I bought a ceramic knife some years ago at a local Aldi store. Aldi is a German based supermarket chain that sells odd hardware and other unusual stuff as well as cut priced food. I bought it on a whim as I was intrigued by the idea of a ceramic knife. It's brilliant. A short white ceramic blade with a very good cutting edge. I later bought a couple of diamond faced sharpening plates and it's as good today as ever.

The funny thing is that recently I thought I'd buy another but I can't find a single one on Ebay and looking elsewhere they are all surprisingly expensive. I guess I'll stick with what I've got.