WTS Books is offering a sale on the Pillar New Testament commentaries. If you buy two or more you get 10% off each volume (and they're already discounted well below the cover price). This is a good series with some really solid volumes. I would particularly recommend Leon Morris on Matthew and Romans, D.A. Carson on John, David Peterson on Acts, and Douglas Moo on Colossians & Philemon and James. Carson's volume in particular may be the best commentary I've found on John's Gospel. You can see the details of the sale by clicking on the Hebrews volume.