Ask Mr. Religion
Flatly Unflappable
Monergism has some deals worth a look:
http://www.monergism.com/blog/free-deeply-discounted-puritan-and-reformed-ebooks
http://www.monergism.com/dozens-free-resources-bible-ministry-and-theology
http://www.monergism.com/blog/free-deeply-discounted-puritan-and-reformed-ebooks
http://www.monergism.com/dozens-free-resources-bible-ministry-and-theology