Check out the ebay listing of one dollar chips from nevada. Mainly Las Vegas.
You will need them as traders if you go to the convention or not.
Some real nice ones current and obsolete...
I will combine shipping costs to same address.
Thanks for looking...
HAVE A NICE DAY!!!

http://shop.ebay.com/merchant/saldar01_W0QQ_nkwZQQ_fromZQQ_mdoZQQ_sopZ12