I bought fourth-hand tail G1 in 1994.
It's a beautiful piano, which has a sound balance excellent.Le touch is very good (for my taste) and mechanical soft and precise. I was in the hands of many different pianos, and Yamaha is in my opinion the best brand now, for a price / quality ratio fantastic. The build quality is impeccable, and the regularity (I tried several G1, all were identical). We find that piano on occasion at the cost of a right high-end, so if you have the place, do not hesitate!
I would do without hesitation that choice ......