I have found what i belive to be a railroad luggage tag it has MOB x OHIO R R 2931 under this it says WAY i would like to know age and price can't tell what type of metal it is think it's brass or copper
just google MOB x OHIO R R to read about the history
as for pricing you could go to the website below or others like it, where collectors would surely help.
here's a couple of collector website. i look for a contact email listed and ask. some answer some don't.
pricing you would have to get more than one reply to attempt to get a concensus.