I believe the price went up due to an aluminum shortage back in 2007, or some kind of other metal shortages, people were also having problems getting raw materials for manufacturing because the military had top priority on getting their hands on the materials before any fabrication companies could, they also raised the price of the raw materials hence the price increase.
You should be able to confirm this with anyone who does metal fabrication or wheel manufacturing. Not sure how much that still affects them .
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