$30-35. The Sahara coin-center chips are so plentiful because
they were not destroyed as most chips are when they became obsolete.
They were stuffed into plastic garbage bags and buried in the desert.
Someone, I'm not sure who, found out where they were buried and dug
them up. There are thousands of each denom although there are fewer
of the 500's as there were not as many minted. Bill Borland ended up
with them--he had hundreds of boxes of the chips.