Yes, I am sorry that the average going price for any vintage dishwasher, at least that I have purchased, is $80. Granted, I have paid $200-$250 for some of my rare dishwasher finds, and those are offset by the few that have been given to me.
When I approach a seller of a dishwasher, I often times give them examples of the machines that I have already purchased for my collection, and make comparisons. I also explain that vintage dishwashers simply do not sell, as a general rule, for as much as vintage Ranges, Refrigerators, and Laundry machines.
Don, I do hope that you will sell your dishwasher to an avid appliance/ dishwasher collector, knowing that it will be loved and cared for, just like it has been taken care of since 1958, even though you may not get a large amount of money for it.
My regards to you.
Mike