KDS-18 Is A Very Good DW
But that one has been used hard and put away wet, LOL. While it might still work there will be lots of other things it needs.
A much better DW to own today if you actually are going to use it much is a low mileage Whirlpool Power-clean or Sears Kenmore Ultra-Wash from 1985-1990. These DWs are much better performers, more reliable and easier to repair.
I have two 1987 WP PC DU8000 DWs in my kitchen and for almost 10 years I had taken one out and used a KUDSS-20 KA DW, overall it did a good job but top rack cleaning was never as good. The other issues were poor drying and a nearly constant smell in the machine caused by left over food bits in the sump and filter.
I put the WP back in about two years ago and retired the very cool KA DW to the museum where it will live out its existence on Earth.
John L.