Hello Nomis,
Caesar's sold the Lake Tahoe properties in 2006 and was renamed Montbleu.
If you are looking to liquidate your $40 Token, it would be best to take close-up pictures and list it on FeeBay or sell it to someone who is interested within this forum.
William Cohenour's Guide Price is $70-$90 but expect to net $55 if you plan to sell. Which is much better than the face value.
I hope this helps answer your question,
Gene