We burned up one cheap flea-bay Chinese grinder, and two Cabela's grinders. I found an OLD grinder on Craigslist, and I think it will grind anything that will fit down the throat.
I've found there seems to be a relationship between the weight of a grinder, (or cuber, or slicer), and how good it is. The grinder portion of this one is a Hobart #22, and the motor/gearbox is a Hoover/Simpson and weighs 143 lbs. Best $50 I've ever spent! Keep looking, they are out there, and will probably be running when we are all gone. Just make sure you have a designated place for them, so you aren't having to move them before and after each use.