Maybe I can score some sort of honorable mention.
My parents still use the microwave they got as a wedding gift in 1987. About 5 years ago, the thing just started dying. You had to basically double the time to get it to heat food properly. They started talking about getting rid of it and I kid you not, it just went right back to working like it had never had an issue and hasn't missed a beat since.
It, and all of its wood-trimmed glory, will officially turn 30 in August.