Yamaha KX88

This KX88 is fully functional and in good condition. It is a terrific MIDI master keyboard, with very good key feel.  
From the manufacturer:  
Total MIDI control Each controller wheel, slide control and switch is programmable by the user to transmit specific MIDI information.  
16-Code Memory Program the MIDI Master Keyboard with the specific control functions you need for your own application. You may, however, want to use these keyboards in a number of situations that require different MIDI control configurations. Up to 16 different configurations can be selected at the touch of a button.  
Specially designed action This action gives an excellent response and feel.  
Multi-Mode Operation Three modes:Single, in which all key data is sent via one MIDI channel, Dual, in which all key data is sent simultaneously on two different MIDI channels, and Split, in which the lower portion of the key-board can be assigned to one MIDI channel and the upper portion to a different channel.