Yahweh said to me, "Go again, love a woman loved by another, and an adulteress, even as Yahweh loves the children of Israel, though they turn to other gods, and love cakes of raisins."
Now the normal price of a slave was thirty pieces of silver. So this fifteen pieces of silver indicates how completely destitute she had become, probably sick, anemic and all through her wasted life; lost her beauty, lost her desirability. He was able to purchase her for half the price of a slave, fifteen pieces of silver.