AKG Q701 headphones. I have to resolder them every year or two, but they're infinitely repairable. I've tried many headphones over the years but nothing comes close to the quality.

DasKeyboard 4 Pro keyboard. I've typed on it so hard for so long that the key caps have started crumbling. Replaced all of the key caps for a few bucks and it's good as new.

PlanetBox lunchbox. It's like a metal lunch tray with a lid. Fully metal, nearly indestructible, rust proof.

A carabineer clip I got at Walmart in '06 for $1. I've used it every day for 17 years and all of the paint has rubbed off. It just won't die.