Abstract: A method of facilitating the exchange of bulk materials is provided. The method involves receiving and storing in a searchable database postings from potential providers of excess materials regarding their respective excesses. The posting includes information indicative of the material, such as its composition, location, source, and contact information for the potential provider. Potential acceptors of material search and view the postings, rather than purchase newly quarried material. The potential acceptors can also post descriptions of their needs. The database is searched, comparing the descriptions of the needs with postings of the excesses. Information about compatible excesses or needs found to correspond with a user's need or excess are then displayed to the user, with information regarding the location of the material relative to the need.