American cars, especially classic muscle cars, continue to be hot items at Barrett-Jackson's and RM Auctions' annual Arizona events.
1954 Dodge Firearrow IV concept car
1954 Dodge Firearrow IV concept car
Sold for: $1.1 million

Description: The four Firearrow concept cars were all designed by Chrysler's legendary Virgil Exner and built by Italy's Ghia.

The two Firearrows sold at Barrett-Jackson's Scottsdale Ariz. auction are the only survivors of the set. Both -- Firearrow II and Firearrow IV -- are driveable cars, but IV was engineered as a production-ready concept. Chrysler decided not to proceed with a production version, however.

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