where do you find the price of metals like alum or platinum or gold?

Question

what i'm asking is like gold $654.00 oz. alum cans $0.79 etc

Answer 1

For gold, silver, and other precious metals:
http://kitco.com/market/

For aluminum, copper, and other base metals;
http://www.kitcometals.com/

Bear in mind that scrap dealers pay about 20% lower than these quotes.

Answer 2

If you are looking for historical price charts for precious metals (30 days, 3 mth, 5 years etc), you can go to http://www.ebullionguide.com/price-chart-gold-last-30-days.aspx

There, you can find price data for the following precious metals:
1>platinum
2>gold
3>silver
4>palladium
5>rhodium
6>iridium
7>ruthenium