That would be my suggestion. Wait until the house sells and slip a note in the mailbox for the new owner. You might be surprised.
We had that dishwasher back when we first "remodeled" our kitchen in 1974. At that time it was a Hotpoint and had one cycle controlled by a knob. The half top rack sat on top of the bottom rack and the two rolled in and out together. When we replaced the dishwasher in 1987, it was the model in your picture and by that time, the half top rack was set up like a regular dishwasher rack to slide in and out independently. Noisy, but good functioning machines...