I sell to 3 different yards and I know one yard absolutely will NOT sell from their lot. I think it's also related to liability as they don't want people climbing around with all the machinery in operation. I was there one day when a gal came in looking for a wheel rim for a fire ring and they said "NO". My regular yard lets me take anything and put it on the trailer and weigh it back across with my empty weight. I don't even ask to take precious metals but did take an air compressor one day (motor and all), fixed the leaks and it works perfect. That yard doesn't take e-waste so any computer just goes to shred.