I'm not sure what these can normally be had for, but this seems like a pretty good deal at the Amazon Big Deal day sale. $250 - 10" grinding wheel, 9" stropping wheel. It ends today.
Depends where you buy but in Home Depot about $358. So that makes a good deal on Amazon. I have the Tormek which I bought many years ago and hardly ever use it. I use it for planer blades mostly.