The 1950 GM Futurliner bus and the 1954 Pontiac Bonneville Special Motorama concept. The Futurliner is the big red one; it sold for $4,000,000. The Bonneville Special pulled $3,300,000. Bother were part of the Ron Pratte Collection and crossed the block at Barrett-Jackson. Photo by Barrett-Jackson Ferraris dominate; GM Futurliner…