For all of its buttons, it appears to be a model toward the bottom of the line. No china guard under the upper wash arm and nothing adjustable about the top rack.
That doesn't mean it won't do as good a job as its more expensive KitchenAid contemporaries though, but be advised that even with "Quiet Scrub" it will still make more noise than a modern day machine. Cycles are short, so for best results you'll probably need to use industrial/institutional detergent that contains phosphates, something like Cascade Fryer Boil-Out, or use a phosphate additive with detergent from the supermarket. Today's phosphate-free detergents need much longer wash cycles to clean effectively.
This machine is either a 23 or 24 series, which makes it around mid-'90s vintage. The common complaint from some people is that these machines (series 21 and later) offer only a single final rinse.
They shouldn't be asking more than $100 for it.
