Add mail handling and more baggage space on your classic streamliner quickly and easily with this WalthersMainline HO Scale 85′ Budd Baggage-Railway Post Office! A common car on many trains, the RPO end of the car was staffed by U.S. Post Office employees who sorted mail enroute while the other end of the car handled luggage and packages. Nicely detailed, affordably priced and built tough for years of dependable service, this car is based on fluted-side cars used my many North American railroads.