I Need The Monetary Value Of A Stamp. Can You Tell Me?

The words on the stamp read at the top it says: Lunch wagon 1890s, then under it it says 23 USA, then there is a picture of a stagecoach or wagon, and printed on the front of the wagon it says The Owl. Next on the wagon sides it reads Night and under it is lunch. It was left as a tip to me and I'm wondering if its worth something because it looks pretty old but in great condition. I've put it in a sealed bag and locked it in my safe. Appreciate anyone's help. Thanks.