The number 30 is the reckoning of Scorpio, its 30 degrees of arc broken into 3 decans, the sign of the sting and the wound where mind imprisons spirit and the god Sin, the old moon deity, rules the shifting emotions. Silver is that same lunar substance, the moving water of consciousness and feeling, and here it is weighed out as the worth of what is holy within. Israel is the whole assembly of inner faculties, Isis the spirit and Ra the mind and El the god within, and by these the Christ life gets appraised at the price of an emotion.
That a prophet is named wrongly, Jeremy standing where another belongs, is itself the tell: the outer record is broken, yet the coded story underneath holds. What breaks is the letter of history; what survives is the buried anatomy. The one thing of infinite value in a person gets tallied in coins of feeling and handed over, and the whole scene is a transaction happening in the mind now.
Silver: the lunar water of consciousness and the emotions, the shifting feeling-nature by which inner things are valued
30 pieces of silver: the 30 degrees of the constellation Scorpio, its 3 decans, the sign of the sting and of the moon god Sin
Israel: the assembled inner faculties, Isis the spirit and Ra the mind and El the god within