thanks to all you folks who gave me info on this.  ebay seems like the place to go to sell and or establish a value.

I have a Bachmann Dwight D Eisenhower commemorative locomotive and tender in a wooden box with a certificate stating that it is #110 of 500.  It is HO scale and is in like new condition.  I'm trying to find out when it was made and an approximate value for estate purposes.  One collector told me it's not really worth anything but I'm not sure if he's correct.  Any input or advice about where to look further would be helpful.  Thanks!
Jim