I think that even if certain chips are difficult to get, it still depends on who you are, when you go to the casino, and who you deal with when you are there. If the right combo is present, even tough to get chips do indeed get out.
I found this picture on the chip board, so at least one person was able to get some quantity of these.
I found this picture on the chip board, so at least one person was able to get some quantity of these.