Yesterday I received an Atlas GP40 in the mail. It's one made by Roco. It had a little internal damage and the rear drive shaft liked to fall out but that is fixed now and it runs very well. It's about as noisy as some of the better Athearn BB locos. The detail is nothing to write home about, about the same as Athearn and it has an Athearn style drive, not that I'm complaining. I only paid $20 for it. The handrails are all intact and it runs like a champ. I would like to know about how old it is. If it helps it has nylon worm gears.