Leviticus 27:15-17

New Century Version

¹⁵ But if the person who gives the house wants to buy it back, an additional one-fifth must be added to the price. Then the house will belong to that person again.

Value of Land

¹⁶ “‘If a person gives some family property to the Lord, the value of the fields will depend on how much seed is needed to plant them. It will cost about one and one-fourth pounds of silver for each six bushels of barley seed needed. ¹⁷ If the person gives a field at the year of Jubilee, its value will stay at what the priest has decided.