Sorry, can't help on the scrapper's location, but lest anyone think Amtrak is being hasty in their decision to "cut 'em up', I think it is a fair statement that someone got economic life from all the carriers.
For what it be worth, six autos of mine have joind me on fifteen trips "over the years'. Since Amtrak commenced the service, all autos of mine, save one on a two year lease and the present placed in service during this past March, have had one or more passages on the AT.
Well that being said, we should note that the bi-level carriers were acquired second hand by the Auto Train Corp from Canadian National where they had been placed in service by CN during 1955. The point, however, that is subject to conjecture is the source of the high speed passenger trucks fitted to them. I was of thought (source as I recall: TRAINS) those trucks were stripped from Railway Express Agency Box-Reefers that dated shortly from after WWII, but, in discussion over at another board, another Member there believes I am mistaken.
The tri-level carriers were ordered new by ATC during 1974.
All told AFAIC, economic benefit was obtained by both passenger carriers. As for the CN, they acquired them to ship new autos from assembly plants, but they were placed in service only shortly before the industry moved towards using auto racks compatible with Trailer Train TOFC equipment. Therefore, I guess for freight service, they were sort of obsolescent upon delivery.
I should note that the CN made short use of some during their 60's passenger service initiative for a service marketed as Kar-Go-Rail, however, I had best defer to others around here on that point.