I am about to purchase a GC table. I am going to look at it before I purchase it, obviously, but Is there a model of GC that a person should stay away from? The owner doesnt know the model and hes in the middle of moving. Would it be safe to say that its worth 500.00 if the rails all match and the slate is in good condition? It has new Simonis that comes with it. Can it be reused? Is there someone on here that could give a guy some additinal info on GC's? Thank you