I've never heard that receiver but it looks to be well built. Could be a nice piece to own. I like the looks of it also. Depending on your area and the actual condition of the piece I might offer 75 but don't think I would go above 120 and go from there. It boils down to what's it's worth to the seller even though he says he doesn't know what it's worth.
Again I have never heard that receiver before.