Doug, they are all common and easily gotten. However, as for the Treasure Island pieces. There as a couple harder to get varieties. They are if the reverse is rotated from 90 degrees and up to completely coin aligned. Hold them like with the front having the design proper at 12 o'clock and slowly rotate it over. If the back side is not also at 12 o'clock you have a better or harder to get variety.

Hope this helps,
Dennis