"For example, while re-doing my bathroom (coincidentally coinciding with Bathroom Month!) I got real slate tile for $.90/sq. ft. I also got a number of tools and other things at a great value. Just a tip, for what it's worth!"
It sounds like a great resource. We checked the Habitat for Humanity site and while there were none in Chicago we did find multiple locations throughout Illinois and beyond...check for all the locations here.