If you can stand an electronic version, you can get all of these Berkof titles (over 1700 pages) on 1 CD (in CROSS format) delivered for $12.90:

Introductory Volume to Systematic Theology
Systematic Theology
Textual Aid to Systematic Theology
Summary of Christian Doctrine
Manual of Christian Doctrine

From here: The Louis Berkhof Systematic Theology Collection on CD-ROM

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Steve Butts - Former SBC-er
Three Forms of Unity - Bradenton CRC - Bradenton, Florida
(A conservative member in a conservative congregation)

"Turning away to false Theology is equal to turning away to false gods" — Francis Schaeffer (Death in the City)