Hi Christine,
Here are the reponses I received from the lister of this strike:

This coin is uncirculated. The strike is excellent. I just talk to my
jeweler and he told me the the center part of the coin is 10k.In 1986 they celebrated 20th anniversary....I was there during the
celebration and when Caesar and the Girls walk through the casino they hand
these out to high rollers only. The item can be shipped cheaper...you just
let me know the method you prefer. If you are the winner I can take to post
office and have it weighed and insured and you can pay only actual shipping.

Thanks!
Charlie