"In today’s luxury economy, those with the disposable income to afford a $100,000 piece of artwork tend to have the income to afford a $400,000-$500,000 piece of artwork, leading to bigger and bigger sales. Eventually, the sums changing hands attract the interest of outside speculators and investors looking for new asset classes that deliver high rates of return. New money brings more competition, which means higher prices and higher commissions, a trend that sellers and auction houses like to call attention to".

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