Most organizations would just toss this stuff in the trash bin.
Twenty-six years of real estate industry accounting here. Actually, these sales are fairly common in the construction and development industry. They don't generate a lot of income but it is still better than tossing it into the dump. There are a couple of large auction firms here in Seattle who will come get your stuff and put up for sale. Big stuff gets sold at auction, small stuff ends up in what looks like a big yard sale; nuts and bolts and the like get sold by the pound.