It looks like Zondervan is pricing several more study/devotional Bibles at $6.99. I've put B&N just because that's where I was looking, but these are almost certainly publisher prices. Most are a few cents cheaper ($6.44) at Christianbook, but Kobo seems not to have updated all of these yet.
NIV Once-A-Day Bible for Women
NIV Quest Study Bible
NIV Once-A-Day Bible
NIV Life Journey Bible
NIV Busy Family Bible ($4.99)
And these two have been on sale at $6.99 for a while:
NIV Starting Point Bible
NIV Stock Car Racing Bible