It's not as hard as you think to find a good, reliable older one. People think they need to "upgrade" by getting the latest model in a popular brand. Brand counts but longevity and reliability have to go along with it.

As for a stainless exterior, personally I avoid it because it shows every little thing. But that's just me.

Browse on Facebook Market Place and Craigslist in yor region for dishwashers. There are plenty to choose from.