Not all pastors are able to purchase Bible commentaries for use in preparing their sermons. However, relatively modern Bible commentaries may be borrowed for an hour and sometimes for as long as 14 days at archive.org. Below are links to lists of these commentaries.
Commentaries on the Whole Bible
The New Bible Commentary, revised by Guthrie, Donald; Motyer, J. A; Davidson, Francis (1979) (Evangelical)
Harper’s Bible Commentary by Mays, James Luther (1988) (Critical)
Old Testament
Genesis, Exodus, Leviticus, Numbers, Deuteronomy
Joshua, Judges, Ruth, 1 & 2 Samuel, 1 & 2 Kings, 1 & 2 Chronicles, Ezra, Nehemiah
Esther, Job, Psalms, Proverbs, Ecclesiastes, Song of Songs
Isaiah, Jeremiah, Lamentations, Ezekiel, Daniel
Hosea, Joel, Amos, Obadiah, Jonah, Malachi, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, Malachi
New Testament
Matthew, Mark, Luke, John, Acts
Romans, 1 & 2 Corinthians, Galatians, Ephesians
Philippians, Colossians, 1 & 2 Thessalonians, 1 & 2 Timothy, Titus, Philemon, Hebrews