Thou sellest thy people for nought, and dost not increase thy wealth by their price.
Thou sellest thy people for nought - Thou holdest thy people as of so little worth, that thou art ready to part with them, not to gain anything by doing so, but merely for the sake of getting rid of them, as of a worthless slave, at any sacrifice. God, in giving up His people to the foe, did not receive in lieu of His people the allegiance of the pagan.
And dost not increase thy wealth by their price - thou makest no gain by alienating them from thee. Compare Jeremiah 15:13. On the contrary, in redeeming or delivering His nation from Babylon, God saith (Isaiah 43:3), "I gave Egypt for thy ransom, Ethiopia and Seba for thee:" I sacrificed mighty pagan nations in order to save the Jews. God is said to sell His people because their affliction by the pagan is not due to chance, but to the all-ordering will of God.