'Buying' in the Bible

When he returned, after receiving the kingdom, he ordered that these servants, to whom he had given the money, be called to him, that he might find out what business they had done.

Take care and be on guard for yourselves and for the whole flock over which the Holy Spirit has appointed you as overseers, to shepherd (tend, feed, guide) the church of God which He bought with His own blood.

making the very most of your time [on earth, recognizing and taking advantage of each opportunity and using it with wisdom and diligence], because the days are [filled with] evil.

Conduct yourself with wisdom in your interactions with outsiders (non-believers), make the most of each opportunity [treating it as something precious].