https://www.logos.com/product/55680/500-book-mega-pack-2015-edition
It's mostly public domain stuff, but it's worth checking out. Just looking at what's 'new to me', I see:
- The James Orr Collection (21 vols.)
- John Williamson Nevin Collection (13 vols.)
- John William Colenso Pentateuch Collection (17 vols.)
- William Burt Pope Collection (5 vols.)
- Austen Henry Layard Collection (10 vols.)
- The Life and Works of Horatius Bonar (47 vols.)
- The Works of W. D. Conybeare (3 vols.)
- William Cowper Collection (6 vols.)
- Alexander Souter Studies in Early Christianity Collection (7 vols.)
- Harry Angus Alexander Kennedy Collection (6 vols.)
- William Henry Simcox Collection (3 vols.)
- The Evangelical Succession Lecture Series (3 vols.)
- The Historical Bible (6 vols.)
- The Messages of the Bible (11 vols.)
Orr, Cowper and Bonar were on my wishlist, and for me the pack is quite a bit cheaper than Bonar by himself.