Seeing as the market is in constant flux, especially for minerals, may be one price one day, and totally different the next. Best to Google stock market and key in aluminum, and see what it is currently going for. If I were to do this, by the time I got back, who knows, the price may have changed. Mind you, I do not believe it is of great value, as it is not considered a precious metal such as gold, nickle, platinum and so on - copper has dropped tremendously in value due to fibre optics
