If he was single at the time you bought him, he alone must be set free. But if he was married at the time, both he and his wife must be given their freedom.
This fiftieth year is sacred--it is a time of freedom and of celebration when everyone will receive back their original property, and slaves will return home to their families.
But if you don't have the money to pay the present owner a fair price, you will have to wait until the Year of Celebration, when the property will once again become yours.