I found this through Craiglist... no affiliation, but thought I would pass it along to other members. Camden County Habitat for Humanity ReStore has rubber roofing pieces for sale, $3/piece of $45/pallet. Looks like maybe the material came from a commercial replacement job. Pieces are various sizes but the smallest are at least a few feet wide by x' length and the biggest are quite bit. Regardless a great deal at $3/each. Located in Pennsauken, just across from Philadelphia. As of Friday they still had quite a bit, as in 10+ pallets.