7.5 Guage Steam Train?.  7' long, 20" wide, 38" tall.  1,037 lbs.  Engines and big wheels are 36" long, 17" wide.  Engine bore approximately 3".  12" drive wheels, 7.25" inside, 10-1/2" outside.  Boiler is 13" diameter barrel with copper tubes.  

I don't know anything about model trains.  Engines run good on air, reverse in good timing.  Boiler is shop built, non code welded, boiler.  Copper tubes.  Craftsmanship is nothing special, looks cobbled.  

Selling AS IS with not liability.  No warranty or returns with this item.  I will answer all questions and have video of engines running on air.   $7,000 or best offer, motivated to sell this item.  Thank you