This keyboard has 88 weighted keys that feel very much like a real acoustic piano. It has full midi capabilities and a good selection of internal sounds.
The book value for this keyboard used is $863.50. Previous owner bought it new and paid $1995.00. He essentially NEVER used it--see pictures. Comes with a case, owner's manual, sustain pedal and power cord.
Check out the reviews on harmony central: http://reviews.harmony-central.com/revie ws/Keyboard+And+MIDI/product/Yamaha/S80/ 10/2
Here's the info from the Yamaha website:
Introducing the amazing S80
A full-sized keyboard that gives you the response and feel you need to capture all the emotion and dynamics of your playing. It offers superb weighted action, an incredible-sounding selection of familiar voices, 64 notes of polyphony and 16 multi-timbral parts. When your music calls for a different tonal perspective, the S80's Modular Synthesis Plug-in System opens the door to new and exciting synthesizer possibilities.
Full-Size Keyboard with True Piano Action
For musicians who are used to playing on a real piano, the touch of the keyboard on the S80 is a dream come true. Engineers at Yamaha took great care in designing the keyboard to deliver the same feel and expression as an acoustic piano. As a result, the S80 responds to the finest dynamics of your playing, from the lightest pianissimos to firmly struck fortissimos.
Top-Quality Selection of Essential Voices The S80's onboard sounds are some of the best available on the market today. The essential voices you use most – organs, brass, strings, guitars and basses as well as a complete collection of pianos (including stereo-sampled pianos!) – are packed into the S80's wave memory. The S80 features a dynamic digital effects processor and an incredible 64 notes of polyphony and a full array of high quality drum sounds.