My antique MagicChef range/stove that my grandfather modified in ways I don't get (yet). It cooks like a professional setup. Other than that, it's got to be my Sabatier (elephant) carbon steel knives. They faithfully perform every task I ask of them.
"To be broke is not a disgrace, it is only a catastrophe." -- Nero Wolfe/Rex Stout
My 1964 Brown colored Gaffers and Stattlers gas stove top range and top oven and bottom broiler..never failed me over the past 30 years!!!..well, I take that back; the door of the oven fell off once or twice!!..but not too worry, we just found a place that carried old parts, and put it back together..good as gold!
My knives are my best friend!!!! But my mom and dad had some oldies but goodies in their kitchen that I wished I would have kept!!! The one thing I did keep was an old green collander, at least 20 years old. I use that tool quite frequently!
The two things I failed to get was an aluminum pot that my dad used to cook popcorn in (the old fashion way!) amongst other things. And a small fry pan that sat on the stove with bacon grease (never washed) that was used for cooking eggs. Boy that thing had seen better days!!! Plus it had a blue green lid...