Thanks for the information guys.
Since probably 99 out of 100 people who are considering buying a used locomotive today are buying it so it will actually run, it would seem to me that the current rating system is a total joke and absolutely worthless.
Imagine: "65 Chevy Corvette for sale. Excellent condition! The engine is blown and it is sitting in a large puddle of oil. Don't miss out on this one!"
I think it is time for some reputable national train organization to adopt a new set of ratings and rules, which include operating condition. I mean, isn't that what organizations are for? :-)
Mannyrock