PURCHASED  UNION PACIFIC SET FROM AN ELDERLY LADY WHO HAD BOUGHT IT FOR GRNDSON WHO DIDNT LIKE IT.SAID THAT WAS THE ONLY TIME IT WAS TAKEN OUT THE BOX!DOES ANYBODY KNOW WHERE YOU CAN GET INSTRUCTIONS THEY WERE NOT IN BOX.NEED TO KNOW HOW HOW FAR TO SPACE TRACK SUPPORTS LEADING TO BRIDGE.ITS A FIGURE 8 TRACK.WOULD ANYONE KNOW HOW OLD IT IS?SHE SAID IT WAS 20 YRS OLD.IT SAYS IT WAS MADE FOR UP EMPLOYEES ON THE BOX.HOW WOULD YOU FIND OUT WHAT ITS WORTH?ANY HELP FOR A BEGINNER WOULD BE APPRECIATED!WHAT YEAR IT WAS MADE.