Abstract: A parts usage comparison system and methods to directly network buyers and sellers in the mining, construction and agriculture industries in order for buyers to easily and efficiently procure parts and for sellers to easily and efficiently liquidate surplus assets specific to the aforementioned particular industries. The present invention provides methods of searching, buying and selling new, used and reman or rebuilt products. The parts usage and comparison system includes a parts database, a processor coupled to the parts database and a software interface. Third party buyers and third party sellers are connected to the parts database through the software interface. This connection allows searching and maintaining of information on the database.