At the recent training seminar in Berkeley, I spent some time talking about the various commentaries available for Accordance. On one end of the spectrum, I talked about commentaries like Expositor's Bible Commentary, which is great for an easily digestible summary of a passage and its key issues. On the other end of the spectrum, I talked about commentaries like NIGTC and Word Biblical Commentary, both of which are critical commentaries which will deal with all kinds of minutiae, discuss various interpretive options and controversies, and generally attempt to leave no stone unturned.
At 58 volumes covering much of the Old and New Testaments, Word Biblical Commentary is the most extensive critical commentary we currently offer. Each print volume retails for around $50, and you can pick them up from Christian Book Distributors for around $22. The Accordance edition of Word is currently on sale for just $699. That works out to be about $12 per volume, and of course, Accordance gives you this massive resource in a form which is fully searchable, which will scroll alongside the Biblical text, etc. I'm not sure how long this sale price will remain in effect, but if you've been considering purchasing Word, now is a great time to do it.