Oldest item overall for me would be my dining room table. My grandpa had a furniture store through to the 60s, and took this one from stock sometime in the mid 50s. It was their dining table for a while, then my parents', now mine. The tabletop is two big slabs of (nowadays) very illegal teak, so it's pretty much irreplaceable at this point.
However, I'm probably more impressed by the fact that my 1986 touring bike is still kicking. All the hard wearing parts have been replaced (cables, bar tape, tires, chain, bearings, rear hub), but otherwise it's all original and in great shape. Let's see your '86 Camry do that!