You have just found a very, very clean 48" Yamaha U1E professional upright piano!
This "Seasoned for Destination" (made for U.S. market) Yamaha was built in 1991 and is in absolutely beautiful condition. Her polished ebony cabinet doesn't have any nicks or chips since it has been taken extremely good care of.
The piano has a big, full sound and will fill your room with music. The touch is even, not too heavy, not too light. Just right!
You don't need to spend over $11K to get a Yamaha U1 that looks like new. You can have this one for about half of that.
The early bird gets the worm. Don't sleep in too late!