In Search of Older Kitchen Aid Dishwasher.

* If you see these during cleanup week please let me know

I work on appliances and have heard a lot about the older Kitchen Aid By Hobart Model. . Different model number that apply are

KDS-17

KDS-18

KDS-20

KDS-21/22

I want to learn how they work and maybe even repair it if the parts are available. Willing to trade. Please don't throw it away if you have one like this.