How many types of scrap are there and how does the price differ?

- I'm calling for scrap, I'm calling for scrap, scrap - you often hear this cry, don't you? Some people think: - where is the scrap? Everyone has already sold and handed over.  Some will want to call, hang up, turn around, open the window, run down the stairs, and somewhere, they are no longer there. He will look at the road with knives and...