John S - nice finds! That Marklin engine is interesting, I have never seen a 4-4-2 electric before.
Recently I picked up this Flyer set, which I will admit I know little about and would love some more info
Three of the four cars had working lights bulbs! The one that didn't was missing the bulb, and it has a darker colored roof that doesn't match the other three. The curly Q couplers are kinda neat, it's shame they don't really mate with anything else.
The engine light bulb is out but otherwise the loco is in good shape. Even the brush plate has been recently cleaned when I received it.