What is my old Railroad Brakeman lantern worth?? Or where can I go to find this?

It's my great grandfathers and says: Star headlight and Lantern Co Honeoye Falls N.Y. U.S.A. Patented. It is black with a handle, and a bulb and switch on the side. I don't HAVE to know what it's worth on here but if you could lead me to a site that'd be great. No numbers either thanks.