Books for sale

One of my favorite things to do is digitize books.  I cut off the spine of the book, then scan and optimize it.  But sometimes I am able to find digital copies of the books I want/have which means I can buy them already digitized.  Logos Bible Software recently released the New Interpreter's Bible, a twelve volume commentary set which is currently one of my favorites, especially for preparing sermons and lessons.  Now that I have it in digital form, my print books need to find a new home/owner.
I have had some success selling them on eBay and have listed my set for sale.  Are there better ways of selling books?  Has eBay proved successful for you?  Are you interested in buying my set?