Apparently Yamaha Piano Company occasionally gives away their pianos for a charitable cause.
“On March 12, 2004, the Make-A-Wish Foundation® of Metro St. Louis – supported by the generous assistance of Yamaha Cares, an employee-based, charitable giving initiative of Yamaha Corporation of America – presented Wish Teen Sarah, of Cobden, IL, with her dream piano – a Yamaha Disklavier.”
I tune many Yamaha pianos and generally find them to be consistent and reasonable instruments to tune.