“So they paid me thirty pieces of silver… ‘Throw it to the potter’ – the handsome price at which they valued me! So I took the thirty pieces of silver and threw them to the potter at the house of the Lord.“ Zech 11.13
Not the happiest of verses for an Advent reading, but there is not joy in Christmas without the anticipation of Good Friday, and, even more so, of Easter. For the traditional price of a slave, Judas sold out his Rabbi, the man he outwardly claimed to pledge his whole life to. Not to mention his very Creator and God. 500 years before Jesus became man, God told his people that they would be rescued, by the means of utter betrayal.
If you interpret the idea of redemption as many Bible teachers do (“to redeem” meaning “to buy back from slavery”), Jesus being sold at a slaves price to his death, by which he frees us from slavery, gives a whole new light to the concept of Redemption.