Those cars are no better than 6464 Lionel, Williams and K-line 027 non detailed toys which is OK if you don't care much. Lionel's 6464's on ebay go for 10 - 15 bucks these days, about what they are probably worth now. I remember paying 75 bucks a car for them back in the day.
For non-scale cars, Atlas Industrial Rail were the best ever offered in that scale. At least they look respectable with stirrup steps and other details. For 17 bucks a car, they were a good deal back then. I gave all of mine to my Grand kids.