Those Mucha-series Main St. Station chips are one of my favorite series. The first chip in the series commanded the highest prices, then got easier to get the later ones. Still a higher premium, even initially, as compared to the usual $8 NIS pricing on the chips. Seems like the price for a complete set of 7 on eBay has sold for about 3x face the few times I've seen one listed. You may be able to pick off individual chips for 2x face or less. The once a month distribution, and the 1-2 per person limits were tough.

If you want to see more of Alphonse Mucha's art nouveau work, go to Paris Hotel-Casino. A fine-art poster store in there (Re Galleries) has high quality reproductions of his work. See their website at:
http://www.alphonsemucha.com/store/mucha.asp

(BTW, their high-quality...and pretty expensive...reproductions are clearly marked with a RE embossing, so there's never any confusing them with the real posters.)