We're not sure we'd call this a three-for-one deal, but it is an impressive classic car sale.

(Sotheby's)

A trio of famous experimental Alfa Romeos was sold at a Sotheby's auction this week for a combined $14.8 million.

(Sotheby's)

The Berlina Aerodinamica Tecnica, or BAT cars, were designed by Franco Scaglione and built by Italian design house Bertone between 1953 and 1955 as a study in aerodynamics.

(Sotheby's)

Numbered 5, 7 and 9, they are the only functional cars that were built during the project. Each explored new technologies, with BAT 7 achieving an incredibly low drag coefficient of .19, which is significantly less than any production car sold today.

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(Sotheby's)

The vehicles were privately owned, driven and even raced over the years by various owners until a collector bought all three of them about three decades ago.

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