I have for sale a Makita wet grinder model 9820-2. I bought this when I was teaching woodworking and was maintaining a classroom full of hand tools as well as jointer and planer knives. It is an excellent machine and will do a fine job on machine knives if set up properly. I have it posted on San Diego Craigslist for $200, but will offer it here for $175.
That seemed like it went alright.