I'm selling my CASIO - PRIVIA PX - 310. This is a great piano with weighted keys. It is also in great condition. This is the description and specs from Casio website:

http://www.casio.com/products/archive/Digital_Pianos_&_Keyboards/Privia_Digital_Pianos/PX-310/

"The PX-310 includes 88 Full-Size Weighted Scaled Hammer Action Keys, Triple Element ZPI Sound Source, 32-Note Polyphony, Touch Sensitive, Bass Reflex Sound System, 202 Tones, 120 Rhythms, 3 Songs, General MIDI, 1/4" Line in and Outs, Optional Stand (CS-65) available. Includes two, 8 Watt speakers. "