One is up now on eBay with a $75 min.
http://www.ebay.com/itm/1-CASINO-CHIP-1950S-ARUBA-CARIBBEAN-WEST-INDIES-SOUTH-AMERICA-/390605660066?pt=LH_DefaultDomain_0&hash=item5af1e95fa2

Looking at eBay completed auctions:
in April-
one sold for
$ 16.50+ $7.60 sh;
$ 42.00+$18.85sh;
$158.05+ $7.60sh;

and in March as part of 3 chip lot
$248.50+$ 7.80sh.
http://www.ebay.com/sch/i.html?_from=R40&_nkw=aruba+caribbean+casino+chip&_in_kw=1&_ex_kw=&_sacat=0&_okw=&_oexkw=&_adv=1&LH_Complete=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=200&_fpos=&_fsct=&LH_SALE_CURRENCY=0&_sop=12&_dmd=1&_ipg=50

Seems like 3 of the auctions were the same person in Pa.

I just happen to be looking at the same thing yesterday and
I would be interested in one at a good price.