Read Leviticus 25:16 Using Other Translations
According to the multitude of years thou shalt increase the price thereof, and according to the fewness of years thou shalt diminish the price of it: for according to the number of the years of the fruits doth he sell unto thee.
If the years are many, you shall increase the price, and if the years are few, you shall reduce the price, for it is the number of the crops that he is selling to you.
The more years until the next jubilee, the higher the price; the fewer years, the lower the price. After all, the person selling the land is actually selling you a certain number of harvests.