There are a few interesting bargains right now:
The Misunderstood Jew: The Church and the Scandal of the Jewish Jesus by Amy-Jill Levine is $3.99
B&N Kobo Parable Amazon
If you happen to shop at a local brick-and-mortar Parable store, ask them for the store's link to Parable online. The store gets a cut of online purchases if you use the link.
The Prophecy Answer Book by David Jeremiah is $2.99
B&N Kobo Amazon
The A to Z Guide to Finding It in the Bible: A Quick-Scripture Reference edited by the Baker Publishing Group is $1.99
B&N Kobo Amazon
The Books of the Bible is $4.99 at
Amazon. It's regular price ($16.99) everywhere else. Be careful if you're looking, because the edition that just contains the New Testament is also $4.99 (so both are the same price at Amazon right now). Make sure you're getting the one you want. In case you aren't familiar with
The Books of the Bible, it's basically the NIV formatted to be read like a regular book. There are no chapter or verse numbers, no footnotes and no section headings.
The Message Bible by Eugene Peterson is $3.06 at
Amazon. This is the lowest price I've seen for
The Message.