Will,
It is not rare by any stretch of the term. Nor are the chips or slot cards. Us chippers will travel to many so called far out locations for our collectibles. I have been to Philadelphia (from MD) twice in the last few years to collect chips and cards. I have seen posts on the board from a couple of others that have visited the those casinos with chips and cards for trade. I believe Bob Gable was one. No currently issued chip, key or slot card is truly rare unless produce in very limited quantities.
Paul