This model is part of the X-Series of Yamaha upright pianos made between 1975 and 1998. The most distinguishing feature of the “X” models like this piano is the radial back posts found in the back of the piano which adds about 70 lbs to the weight of the piano and improves tone projection, power, and sustain. The result is a noticeable upgrade in tone and touch from the average Yamaha upright that will be very obvious to the demanding pianist or teacher who would prefer a grand piano but must have an upright. The presence of sound vents in the front panel further adds to the vivid tone of these models. This model was designed as an upgraded version of the already very capable Yamaha U3 model. The closest equivalent model today is the YUS3, which is priced at $20,699 and DOES NOT include the radial back post design of the X-Series. In short, this high-performance upright is capable of meeting the requirements of everyone from students to professional pianists. This piano is in mint condition inside and out with decades of healthy life ahead of it. With pianos like this available at our shop, all covered by our 10-year warranty and including our lifetime upgrade guarantee, there’s no reason to break the bank to buy a new, overpriced new piano.