"Yes I have the MTH engine #425..."
I do not. It is not a model of the actual loco, which is not always a deadly sin, but in this case it is - that is, I see no reason to buy one as I have no connection to the loco in its present circumstances.
Now - if MTH would produce it in its original Gulf, Mobile and Northern paint scheme, with the GM&N logo on the tender, I would buy one, even though the real 425 is not a USRA-design loco, and the MTH model is.