I found an old Marx train set in my buddy's garage a while back and I don't know jack about them. It's a steam loco with 4 cars. 1 is a coal car, a caboose, PRR freight car and a New York Central freight car. The box has 2 transformers in it and there is a bit of track, straight and curved. The cars are 4 wheeled and don't have real trucks under them. I'd just like to know what I have and if it's actually worth antything or if I should just trade it for some N gauge stuff.