Leviticus 25:15-18 Living Bible (TLB)
14-16 Because of this, if the land is sold or bought during the preceding forty-nine years, a fair price shall be arrived at by counting the number of years until the Jubilee. If the Jubilee is many years away, the price will be high; if few years, the price will be low; for what you are really doing is selling the number of crops the new owner will get from the land before it is returned to you.
17-18 “You must fear your God and not overcharge! For I am Jehovah. Obey my laws if you want to live safely in the land.