This is a Lima N Scale 70 Foot Passenger Coach car with Rapido Couplers marked New Haven Railroad.  I bought this at a Train Show so I can't tell you too much about it.  It is made of plastic with metal parts and has very good detail, note the markings.  It is about 5 1/4 inches long and is in very good condition.

I will gladly combine these small items to save on the shipping.