This is a Lionel O Gauge Union Pacific Dash-8 40C Diesel Locomotive 

Lionel #6-18205

engine is in excellent cosmetic condition.  Runs and reverses.  Lights work.  Sound works - but sticks in the on position as you reverse the engine.

This is from an estate sale - The trains have been stored in a basement for 20+ years and as such may have some dust/dirt on/in the boxes.  I am NOT a train retailer and as such will do no service/maintenance on the train being sold.  Sold As IS.