Well, I only paid $70 and I feel like I got $20 worth of use out of it. And it isn’t like new. It’s totally functional, but probably could benefit from some new bushings. And I have it listed locally for $100
I have the same grinder at work that is my dedicated depth gauge grinder. Works great can't tell you how many hours are on it. But on a busy week I bet it gets 4hrs of run time.