Have you fired up the layout or tried to test any of the engines to see if they still work? You can use an HO power pack if there is no power source there on the layout. Even after sitting all these years I would think they should still work even though they might need some TLC.
I agree that those engines could be worth a lot of money. I would definitely clean them up as best as you can. Maybe lube them also. The better their condition the more money there is.
You may want to call an auction house that deals in trains rather than a hobby shop. The auction house, if a good one, will advertise this stuff and bring in people from all around.
Good luck, Rick
