Valve seat grinder

I had a black and decker valve grinder for a while. Had 2 separate motors, the one that spun the valve was bad, needed to be rewound, was quoted over $400. The other one that spun the grinding wheels needed help too, I was looking at having $600+ into it so I said"no way" and wound up sending it for scrap. I will have one eventually. I've had a couple offered to me for free (like the B&D one was years ago before I had a garage to put one in that I had to turn down at the time.
Not something I'd use enough to put $600 into one.