John,
You do agree with Nate's statement of "I find it interesting that they are all the same color. It seems unlikely that the casino would use the same color for different denominations." Correct? I would think you do agree since you said "Good observation, Nate." *I* will take it a step further & say that *I* think they are most likely samples..................As to their value I have no clue.
Andy - Las Vegas