If you look on ebay under tokens and or strikes what you have is collected and collectible. Not sure about the Sands as for value. Most of the casinos had them at one point back in time. And naturally depending on condition.

In looking at Bill's strike guide in the Related Tokens area he has two listed.
1986 and 07/08 values $29 - $49
1987 and 07/08 values $35 - $79

Both are 1 1/2 oz.

Dennis
SS-094