We're almost done with our kitchen remodel. Not all of our materials were purchased off craigslist but we definitely would have spent a lot more if we hadn't used craigslist (all of our appliances, flooring and some tools).
My favorite was the flooring. My wife had been going back and forth on which flooring to get based on pricing and what she like the look of. I checked craigslist one day and sure enough there was some laminate that she had considered for about 20 cents per sq foot. It only had about 2/3 of what we needed but we figured we'd still be saving a ton. Well when we went to Home Depot the lady in the flooring area let us know her husband worked at the home depot on the other side of town and they had some returned flooring that was on discount (it was a special order only so having it available immediately was another sweet bonus).
I was surprised you are in a pretty rural area and still able to get your supplies on craigslist. When we lived in LA and DC we found craigslist had everything, not so much in the smaller areas. Are you driving to Ft. Wayne or South Bend?