If its a hydraulic operated one I would expect that it should be close to the weight of a smaller Cincinatti ID/OD grinder. Somewhere in the neighborhood of 1000KG/2200LB. Plus or minus a bit each way. Not something I would want to put into a basemant shop. But a small grinder in good shape would be nice to have. Not required but nice. We actually have part of one of these at work that they were planning on using for a project that was never finished. I really should find out if they are going to toss it and if the rest of the parts are st ill on the shelf.
The optimist says the glass is half full, the pessimist says it's half empty. The paranoid in me says somebody put a hole in it.
Remember pessimists are at heart opptomists. They know things can and will get worse.