CBD currently has the best price I've ever seen on the 12 volume Hendricksen/Kistemaker commentary set at $99.99. They will be released on November 30, 2007. If you don't own these volumes, I highly recommend that you get them! This commentary is filled with sound biblical exegesis and pastoral wisdom that everyone should consult when studying, teaching, and preaching from the NT.
CBD writes: "This set is ideal for pastors and serious Bible students of the Reformed tradition. It is the only complete commentary on the New Testament written solely from a Reformed perspective. This award-winning twelve-volume hardcover set features verse-by-verse exegesis and applications, critical notes on the Greek text, chapter summaries, and extensive bibliographies and indexes."