A 1958 Zündapp Janus, est. $30,000-$40,000, named for the two-faced Roman god. A sleek mini-roadster from Australia, the Goggomobil Dart enjoyed a strong fan base. Estimated sale price: $35,000-$45,000 A three-wheeler with Ferrari-like looks, about 2,500 of these British 18-hp cars were built. Estimated sale price: $10,000-$15,000 The fastest Messerschmitt-type car built, with 20.5 hp. Estimated sale price: $125,000-$150,000.
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