The priest will determine what its value is. The value will be whatever the priest decides.
Joash told the priests, “⌞Collect⌟ all the holy contributions that are brought into the Lord’s temple—the money each person is currently required to bring and all the money brought voluntarily to the Lord’s temple.
If it is an unclean animal that cannot be brought to the Lord as an offering, bring it in front of the priest.
If you want to buy it back, you must pay its full value plus one-fifth more.
The priest must figure out the field’s value until the jubilee year. You will pay its value on that day as something holy, belonging to the Lord.