how do I know wholesale prices for copper and aluminium scrap?

Originally Posted by beardo

You can get the general commodity scrap prices on various commodity websites. There are several devoted to scrap/metals. Available by google search. That will give you a base line, however there are to many factors that will determine what individual refineries will pay. The big key to all this is if you can supply the volume most companies require and if you can do it cheap enough inside the extra margin.

I don't know what websites I can trust? Do you know any?