There were several significant sales at this year’s Barrett-Jackson auction in Scottsdale, Arizona, such as the first GMC Hummer EV and Ford Bronco to roll off the assembly lines. However, none topped the final price someone paid to own Carroll Shelby’s personal 1966 Cobra 427 Super Snake. When the gavel finally struck, the “Cobra to End All Cobras” had a final sale price of $5.5 million. Interestingly, this is about the same amount its previous owner paid back in 2007. The brilliant blue roadster, chassis No. CSX 3015, has quite an interesting history.Starting out life as a 427 Cobra Competition used for a European tour in 1966, it underwent some major upgrades the following year. The goal was to turn it into the ultimate Cobra 427. The mufflers, windshield, and bumpers were all removed. Very appropriately, it was renamed Cobra Semi-Competition and was (barely) street-legal.