>>1716358doesn't exist. A classic specialized mtb is kinda the same in terms of good design/ ubiquity/ value, but the Casio is special because it's hassle free and the same design from the 80s is still in production. Whereas a classic bike is a project. You wouldn't ever 'restore' a casio, that's against the entire ethos. You'd just buy a new one.
Though... maybe some omafiets dutch bike has been the same for 40 years and is cheap/disposable/good?