Shesh'ta was a currency used by the Goa'uld, or at least Apophis.
Apophis once put a bounty on Teal'c's head; a million shesh'ta. This was considered a considerable incentive. It is possible it was only of value on Chulak or a few other planets, as ounces of naquadah were used on other planets, however as this was after the fall of the Goa'uld System Lords it is not known for certain. (SG1: "Family")