OK let's be real, the Blue Diamond Stump Grinder is a costly asset. Is it worth it? It probably depends on how many stumps you have on your property. I bought this a little over a year ago and I have ground out 551 stumps on my property and 6 more on a friends. It's been a while since I've been Quoted a price for grinding a stump but let's just say $100 on the low end. That's $55,700 worth of work so far!! It takes me an average of 20 minutes per stump.