Theo A Kochs Barber Chair

This chair and two others have recently been cleaned out of my father's barber shop.    We are not sure of the value of the chairs and the prices found on the internet are all over the place.     The first is a Theo A Koch chair, still fully functional, hydralic pump works fine.   We think he had it fully restored years ago, but cannot find any proof of restoration, other than it looks great and is in great condition.