Fuel-efficient used cars a hot commodity

This summer's gotta-have-it item is turning out to be a 10-year-old car.

Four-dollar-a-gallon gas has droves of people searching for cars that get good gas mileage. They're haunting used car lots, posting "Wanted" ads online, and keeping a vigilant eye on the classifieds. The cars of choice: Hondas (Civic and Accord), Toyotas (Corolla and Camry) and Fords (Focus and Fusion).

Loved for their efficiency and reputation for reliability, these cars are now drawing offers far higher than their Blue Book value. Some sellers report bidding wars that would make a new car dealer envious.

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