If they still run like they did when they were new, they’re probably worth close to that. Nothing runs like a Kato, though the state of the art as far as details has long passed them by.
I have maybe 2 doz other yellow box kato engines just no C425 and like you say nothing runs like a Kato
I've got a few things from this guy before so prob get them for $80
As long as they are kato unit and not roco units you should have a good running loco. I have two of the older roco atlas and they both sound like a meat grinder running. And I have two older kato units and they both run just as smooth as any of the new loco's today. like someone said just not up to date on details like the new loco are.