Attention: The shipping is calculated based on location, so I am not sure the listed amount shown will be correct. It could be much less. Test your location. I may decide to keep this new workstation if it does not sale after months posting! Excellent new open box item. Kept in smoke free pet free home. Will ship in double box for extra protection! 
CASIO is excellent product, I have owned a few different CASIOs and they all are Amazing!!!  I was drawn to this one because you could use an ipad 2 to bring instruments that have a real superior sound from an app to the synth. There is a video on youtube about it. Once i got it, I really had no time to do music so I just keep it in my home in its original and additional box.  

Technical Specs

WK-7500 Specifications
Keyboard76 Piano-style keys
Touch Response2 Sensitivity levels / Off
Sound SourceTri-element AHL
Polyphony (max)64
Tones800 incl 50 drawbar organ tones
User Tones100 tone editor + 50 drawbar organ
Drawbar Organ Tones50
Built-in Rhythms250
User Rhythms100
Reverb10 Types
Chorus5 Types
DSP100 Preset / 100 User
ControllersStart / Stop, Intro, Normal / Fill-in, Variation / Fill-in, Synchro / Editing
Pattern Sequencer8 track editing x 6 patterns (intro, normal, normal fill-in, variation, variation fill-in, ending)
Rhythm EditorEasy Edit using Patter Sequencer
Song Sequencer16 tracks + 1 system track supports up to 5 songs.  Real time recording, steprecording, song edit, track edit, event edit, punch in / out
Mixer32 Channels + ext in (instrument or mic), 9 sliders
Layer / SplitYes
Registration Memory6 sets x 16 banks, 100 user presets
One Touch Presets250
Pitch Bend Wheel0 to 24 Semi-tomes
Sliders9
General MIDI Compatible16 Channel multi-timbre received, GM level 1
RecorderUp to 5 audio files
SD Memory Card StorageSD or SDHC
DisplayBacklit LCD
Speakers w/ Bass Reflex System4.7” x 2 + 1.2” x 2
Amplifier7W + 7W
Terminals
Line OutL / Mono, R - Std jack
Mic InMono - Std jack
Instrument InMono - Std jack
Audio InStereo - Mini jack
USBYes
Sustain PedalStd jack
Headphones Stereo - Std jack
Power12V DC or six D cell batteries
Included Accessories
AC AdaptorAD-A12150
Music StandYes
Dimensions and Weight
Unit size L x W x H46.7” x 15.7” x 5.9”
Unit weight19.6 lbs.
Boxed size L x W x H49.5” x 19.5” x 8.0”
Boxed weight28.7 lbs.