Mayeli Vasallo (left) and Jorge Monte pump gas in Miami in April. The average price of a gallon of gas has dropped 20 cents in the last month, to $3.73. Joe Raedle/Getty Images hide caption

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President Obama talks with actor George Clooney during a White House meeting about Sudan in 2010. The president is attending a fundraiser at Clooney's house Thursday, along with a few sweepstakes winners. Pete Souza/The White House hide caption

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Stone Hedge, a 10,000-square-foot Detroit mansion built in 1915 is listed at less than $450,000. Jessica J. Trevino/Detroit Free Press hide caption

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