Abraham Piper directed our attention to this post which consists of 18 Tricks to Memorize Scripture [how do you memorize these 18 tricks?]. If you are interested in accountbality and a system to memorize Scripture, turn to Tim Challies and sign up for his Scripture Memory course, look here or here.
Cumberland Valley Bible Bookstore, where I have ordered for a very long time.
Reformation Heritage Books always a favorite of mine.
Westminster Theological Bookstore always offers $5.00 shipping.