Are you buying one? Which one? The DC model? I have a 6010 DC, which is the same only one or two years younger. I like it. In 1983, I bought it new at the AAFES store in Germany off the clearance rack for $300 and set it up with a Pioneer PL-707 turntable and a pair of Cerwin Vega D6E's. (which my younger brother has since seem to think he inherited....) It has the best flywheel tuner action of all my Marantz's and the FM tuners reception is pretty dern good too. Has about 80 wpc. and it's loud. It also sounds pretty good to me. Not as good as my 170DC, but pretty dern good. I bought a simulated wood case in very good condition on eBay about a year ago for $5. It's lookin' purty.
The build quality isn't probably as good as the 22XX's, such as the faceplate is thinner and the internals aren't quite the same, but if it had the right price, I would definitely consider it.
I have some literature if you are interested.