Parts-just don't forget to gut the things for copper wire, theres a fair bit in bigger motors, enough to make it worth adding to a 'slop bin' for nonprecious but valuable metal scraps.
Keep that up long enough, and you get a nice fat refund out of it, with todays prices on copper. All the Cu or brass turnings on the lathe in the shed get saved in a scrap and turnings bucket, and cashed in, and I'll salvage anything from a bricked window with lead strips lying in the street, to someone's skip full of trash, lead roofing scrap, copper pipes, etc (or if its an abandoned, derelict building, not be too averse to throwing a few bricks myself once the pipework and if lucky, boiler, hot water tank etc. remain still unclaimed
), I even add wheel balancing lead weights that fall into the gutter from car wheels to the pile, seeing it as every gram closer to a kilo, and every kilo closer to a slap up hot dinner and a crate of cold beer to relax after slogging backpacks of metal scrap to the yard to cash it in. Car batteries (best left whole, the acid in a drained battery isn't too concentrated, not enough to make it worth my while, although lead salts sometimes do get called for such easy salvage for my uses), but the acid in there is HEAVY, and gets counted in along with the price of the scrap too if the place isn't run by a complete tosser.