>>21248888Checked.
I checked, and apparently based on time period and location it was likely Tyrian Shekel that was used to pay Judas.
Those from the time period and graded will sell for >$1,000-$3,000 a piece now. They are referenced to be worth about a months pay for a laborer. So 30 Shekels was worth about two and a half years of common man income.