Thats a tough call. What you have there is a Wooden Nickle. They are extemely common for places like Joe's Harware or XYZ Dry Cleaners. I havent seen them alot for casinos though. So I would start out fairly low and see where it goes. Now that the chippers here know its gonna be on ebay...maybe there will be a buying frenzy. It would go for alot more if it was from a casino that was in high demand.

Good luck with it