Acts 1:
This would explain the coincidence that the price of 30 pieces of silver was the right amount for purchase.
It also explains the coincidence that Judas killed himself in the very field that he was interested to buy before the betrayal. But it was ironic that he thought he was going to live there.
Ultimately, it was all arranged by God's providence, Zechariah 11:
Matthew 27:18 With the payment he received for his wickedness, Judas bought a field; there he fell headlong, his body burst open and all his intestines spilled out.
While arranging to betray Jesus with the priests, Judas might have expressed interest to them in what he intended to do with the reward money. So, the priests used his money to buy the field according to Judas' wish.3 Then when Judas, his betrayer, saw that Jesus was condemned, he changed his mind and brought back the thirty pieces of silver to the chief priests and the elders, 4saying, “I have sinned by betraying innocent blood.” They said, “What is that to us? See to it yourself.” 5 And throwing down the pieces of silver into the temple, he departed, and he went and hanged himself. 6 But the chief priests, taking the pieces of silver, said, “It is not lawful to put them into the treasury, since it is blood money.” 7 So they took counsel and bought with them the potter’s field as a burial place for strangers.
This would explain the coincidence that the price of 30 pieces of silver was the right amount for purchase.
It also explains the coincidence that Judas killed himself in the very field that he was interested to buy before the betrayal. But it was ironic that he thought he was going to live there.
Ultimately, it was all arranged by God's providence, Zechariah 11:
13 And the LORD said to me, "Throw it to the potter"--this magnificent price at which they valued me. So I took the thirty pieces of silver and threw them to the potter in the house of the LORD.