Anywhere from $12,000 to $18,000 US, depending on wear and tear
Check the back count, but this isn't that important.
Check the body count and software in the camera body. If it is an older software you have to get it updated so it will work with newer lenses.
Best of luck with it and that seems like a GREAT deal if you can get it for around $14k.
Also, gert the serial number from the back and make sure what your warranty options are with Phase and if you can extend anything. Phase are great guys on the phone and email.