All of these cars run on the common Micro K'nex plastic track pieces that are used in many K'nex Roller Coaster sets.  They all have the pin on the underside so that they can be lifted by the common micro chain.  All used cars are in very good clean condition.  Used items may show some minor signs of use such as light scuffs or nicks in the paint along corners or seams of the car body.  We also have many cars available that are still new in a sealed bag from the manufacturer, as well as some that are new/unused but without any kind of packaging.  Track piece shown in the photos for reference, not included.

There may be some minor color variation among some of the items (especially blue and red), as well as varying degrees of metallic hues on the metallic cars.  Some are a high-gloss, nearly mirror finish, while others have only a slightly metallic, or matte appearance.