Your answer, "He returned it to the priests", is not correct.
The correct answer to
What did Judas do with his 30 pieces of silver?
is
He bought a field
as shown by
Acts 1:17-18
which is
- KJV
- [17] For he was numbered with us, and had obtained part of this ministry. [18] Now this man purchased a field with the reward of iniquity; and falling headlong, he burst asunder in the midst, and all his bowels gushed out.
- NIV
- [17] he was one of our number and shared in this ministry." [18] (With the reward he got for his wickedness, Judas bought a field; there he fell headlong, his body burst open and all his intestines spilled out.