Here is an O gauge Marx 0-4-0 windup sheetmetal steam engine with a plastic boilerfront and tender!  This one has a windup (mechanical) motor and runs in forward fine, and the metal piece inside for the sparkler flint is still there (see the last photo), although you will need to get a new flint.  The tender included is a New York Central black 4 wheel tender with white lettering.  It is equipped with 4 stamped metal wheels on metal axles and has a plastic knuckle type rear coupler.  Photos show the engine and tender from all 6 sides, with a penny in the shots for size reference.  The video shows the engine working - please note that the windup key is NOT INCLUDED, although you can get both the windup key and that flint insert from Robert Grossman (Google him if you need Marx parts).  Priced to sell, with only actual USPS Ground Advantage or Priority Mail shipping on the 1 1/2 pound package charged!