I'm always amazed at the people who post things like "never been serviced or modified ...all original" with a big smile and pull their britches up...as if those things are actually a plus! These days this stuff is all getting very old (for a piece of electronic equipment) and while it's great to have one unmodified and definitely un-molested, such units should command less money than one that's had say a $5-700 restoration performed on it.
I definitely see the appeal when it comes to collector show cars that are babied on and off trailers once a month and treated as museum pieces...but your only going to sit there and LOOK at it, not drive it daily. That would require belts, hoses, radial tires instead of dry rotted bias plys, New plug wires rotor etc etc....and certainly a car won't blown up one day out of the blue like a receiver will if you don't replace aging tired parts and set things like bias and dc offset.
Sprry, I had to. All that aside, it's a gorgeous receiver..I have one myself in my collection and it is hands down the best sounding kenwood I've owned or worked on.