Gotta be the KitchenAid mixers no? Especially the older ones. I have a friend that has one from his grandma that's over 50 years old. If anything breaks, it's usually a gear or something simple to fix, and the parts are easy to buy and generally cheap.
I've managed to get a hold of 3 of the old ones through garage or estate sales, but yeah the ones that are brand new have plastic parts in them which drives me crazy. But you can at least 3d print what you're missing