Scrap metal prices are constantly varied based on current market prices. Local versus international markets also vary quite drastically. Your best bet when selling scrap metal is to look into your local buyers and the prices per pound that they are currently paying. Of course, their rates will fluctuate based on international markets. Finding a fair local dealer can take some background research. Try to find one whose prices adequately reflect the international market prices, as the buyer will likely be exporting the metal they buy internationally.
The type of material that you have also depends on the price per pound that you receive. Some scrap metal buyers will buy everything you have, while others only deal in aluminum or copper or steel. So you definitely have some background research to do before selling or collecting your scrap metals.
SCRAP METAL CALCULATOR: http://industrialsurplusworld.com/calculator
Industrial Surplus World