Logos Bible Software has a feature called Community Pricing. It works like this. A book (or set) is chosen for publication. Interested persons are asked to place a bid on the completed digital publication. When there are enough bids to pay for publication the book is published. After the initial publication, the price goes up. I have purchased many Logos publications using Community Pricing and Pre-Publication Specials.
To use the Community Pricing or Pre-Pub specials you must already have Logos (or the older Libronix) on your computer. You may purchase a base package from Logos (here), or buy a relatively inexpensive set of books from someone like Rejoice Christian Software. I suggestion you buy something like the Baker New Testament Commentary ($79.95 here), the Norman Geisler Apologetics CD-Rom Library ($29.95 here), or one of the other great specials they offer.
Here is a Community Pricing special too good to miss for anyone interested in the land of the Bible: The Land and the Book by William M. Thomson. This is an old work that is rich in information about the land and the culture of the Bible land.
Rich with scriptural landmarks and filled with hundreds of beautiful pen-and-ink illustrations, Thomson’s The Land and the Book has been a popular classic for over 100 years. Learn more about the people, places, and historical events behind the text you’re studying. Incorporate pictures, illustrations, and graphics into sermons, school papers, or Sunday school lesson plans. Whether you are a student, pastor, scholar, or layperson, the 3-volume Land and the Book is a must-have resource for Bible study or reading.