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Our top-secret Barrett-Jackson correspondent reports on the sale of GM's Futurliner โ€” a mega-bus designed by Harley Earl and built for GM's Motorama presentations in 1950.

The 1950 GM Futurliner just set three records with a $4.5 million sale. It set records for biggest sale at Barrett-Jackson, biggest sale for a GM vehicle at auction, and biggest sale for an American-made car at auction. Plus, biggest sale for a damn bus.

Example of GM's post-war market dominance and technological prowess, or glorified Oscar Meyer Wienermobile? You make the call. [Update: The final price was revised downward, says Jalopnik's correspondent, "Total sale price is now $4.32 million. [sarcasm] Pffffff. Not quite as impressive as before, huh? [/sarcasm].]

1950 General Motors Futurliner Parade of Progress Tour Bus [Barrett-Jackson]