I spotted this and my first reaction was "Wow!". Beyond my price range at the moment but I'll be interested to see what this goes for:

http://cgi.ebay.co.uk/Antique-Japanese-Samurai-Shaving-Razor-Blade-Stone_W0QQitemZ190221085712QQihZ009QQcategoryZ3599 0QQssPageNameZWDVWQQrdZ1QQcmdZViewItem