Not a train, but a pretty cool piece of equipment -- 1957 VW Pickup truck with drop sides. Turns out the owner and I ran in some of the same circles back in the mid-late 1970's. This would be something cool to have in O scale.
Another weakness I have (but not the time, funds, or talent to support) is vintage automobiles. This is a 1929 Duesenberg which took third in its class at the recent Concours de Elegance at Trump National Golf Course in Rancho Palos Verdes. This particular car has been in the family for almost 60 years and was restored several years ago. It's one of five Duesenbergs that is NOT owned by a millionaire. Jack "The Apprentice" Kemph's father did the head work (DOHC 32-valve straight 8) on the car and was making some cosmetic repairs on the chassis. I don't recall seeing any Duesenberg 1:43 models out there, but that might be because back then you bought a chassis and had the car built to specifications by a separate coach builder.
As for Trains, here you go: