Pretty much anything you can find in the road. Tools, money, clothing, hardware, wheel covers. Haven't bought a bungee in years, even found a package of a dozen brand new ones. Top scores have been a 1/2 Milwaukee corded drill and not 1, but 2 Chevy classic 70's muscle car top hat rally wheel centers I sold for $50 ea, as well as a late 30's Packard hubcap that sold for $100, complete set of Craftsman ratcheting combo wrenches. Enough sockets and screwdrivers that I leave the Chicom ones lay. Best place for good tools is within a couple blocks of a repair shop. Dropped in engine bay and can't find, a block or two and it finds it's way out.