Selecting appropriate rolling stock for your O scale railroad layout can be a fun part of the process. It should represent the functionality of the railroad you are depicting, whether that means passenger car consists, covered hoppers, ore cars, or reefers. Most rolling stock will not be quite ready for prime time without some modification, such as changing plastic wheels for metal wheels, installing KaDee couplers, and properly ballasting the car for adequate weight and balance. Start by looking for quality rolling stock at discount prices, and be sure to bookmark this page to check back for new offerings appearing daily.