Sparkygreen
Hello & Welcome to the Forum!

You are facing a problem many who inherit trains encounter.
lf you are curious for your own information yoi can purchase Greenberg Guides and look up their value.
You can also view the various online auction sited and average sold/completed sale prices.
If it is for insurance purposes, contact your insurance agent and discuss it with tjem. They may have an appraiser they use or could recomend.
A train shop may help you with this.

Hope this is of some help to you.

Happy Rails!
dave..