There aren't many $100 collectors so in a manner of speaking that makes most defunct $100 chips "rare"
It is difficult to assign an accurate value first because of demand and secondly because of the unknown quantity still in collectors hands thirdly because in this case at least I think the Trop would still accept them.

Bear in mind that with the exception of the recent Playboy chip debacle, all A/C chips regardless of whether the casino is still open or not are redeemable.
Therefore regardless of condition, that chip will always be worth at least $100