Hello Jan, you are correct! I think I have mixed this auction up with a similar NIB ad...the other one only showed the box art and I incorrectly assumed Nickle plate from the box art.
EBay sent me this ad and said "no longer available" so I thought it was the one I was keep an eye on!
I went to the link you posted and can easily see it is brass boiler by the photos of actual engine.
Now I know these are no longer made the price makes more sense...Sorry for my confusion!