That machine looks like it has been hardly used, if it all. This machine is definitely worth saving for a collection or museum.
The other option is that you can use this machine as a daily driver, however, the plastisol lining does not last long. Most of these dishwashers rusted out in 5-7 years. Other than that is was not a terribly bad dishwasher, perhaps not the best ever built, but in some ways better than a lot of the newer ones.