Charles and others
Except for the fact that it has a non prototype set of lettering that reads "Union Pacific", the ONLY similarity to that engine and an FEF [of any class] is the 4-8-4 wheel arrangement. I have seen this engine offered for sale before at a similar [or higher] price. The family is very impressed with their own [alleged] lineage, as well as the skills of the builder. From the text description, it is clear the seller knows little or nothing about model engineering. At best it is a crude model, no matter the quality of the machining. The price is about $125,000 TOO HIGH.
As usual, just my biased opinion based on few facts and lots of observation.
Regards