Then he must count the years since the land was sold. {He must use that number to decide how much to pay for the land.} Then he must buy back the land. Then the land will be his property again.
If there are many years {before the next Jubilee}, then the price will be high. If the years are few, then the price will be lower. Why? Because your neighbor is really only selling a number of crops to you. {At the next Jubilee the land will again belong to his family.}
Or his uncle or his cousin can buy him back. Or one of his close relatives from his family can buy him back. Or if the person gets enough money, he can pay the money himself {and become free again}.
But if the person gives his field after the Jubilee, then the priest must calculate its exact price. He must count the number of years to the next year of Jubilee. Then he must use that number to decide the price.