Leviticus 25:14-16

14“ ‘If you sell land to any of your own people or buy land from them, do not take advantage of each other.

15You are to buy from your own people on the basis of the number of years since the Jubilee. And they are to sell to you on the basis of the number of years left for harvesting crops.

16When the years are many, you are to increase the price, and when the years are few, you are to decrease the price, because what is really being sold to you is the number of crops.