If you make a sale to your neighbor or a purchase from him, you must not take advantage of each other.
When buying from or selling to a neighbor, the people must not take advantage of one another.
This verse sets the ethical rule for transactions.
13In this Year of Jubilee, each of you shall return to his own property. 14If you make a sale to your neighbor or a purchase from him, you must not take advantage of each other. 15You are to buy from your neighbor according to the number of years since the last Jubilee; he is to sell to you according to the number of harvest years remaining. 16You shall increase the price in proportion to a greater number of years, or decrease it in proportion to a lesser number of years; for he is selling you a given number of harvests. 17Do not take advantage of each other, but fear your God; for I am the LORD your God.