I just did aluminium to USA dollars per pound: Australian dollar 1.10 per kilo to US dollars per kilogram to pounds - Wolfram|Alpha, but it looks like your aluminum prices are about the same as what I saw here about a week or so ago. It's a world market, and the prices fluctuate on a worldwide basis due to changes in the overall economy. Here in the USA, the economy at present is unsettled and not particularly strong. This translates into lower factory production, which in turn means lower demand for raw materials. We scrappers are in the raw materials business whether we realize it or not.