What's My Car Worth? - Season 6

At RM Auctions in Monterey, Keith and Josh check out a record-shattering 1967 Ferrari 275 GTB/4 once owned by the "King of Cool"- Steve McQueen.

Keith Martin and Josh Nasar start the show in Scottsdale, Arizona at Barrett-Jackson's world-renowned collector car auction, where they discover a 1970 Shelby GT-500 and a Mustang Mach 1 428 Cobra Jet.

At RM Auctions in Monterey, Keith and Josh check out an extremely low-miles Lamborghini Countach, and an impressive million-dollar Shelby 427 Cobra.

In Monterey, California, a legendary 1964 Ferrari 275 GTB/C Speciale hits the block at RM Auctions as Keith and Josh discover the extraordinary significance of this unparalleled example- one of the most valuable ever offered at public auction.

Keith Martin and Josh Nasar head to Barrett-Jackson in Scottsdale where they see some classic muscle in a 1970 Chevelle SS LS6. At RM Auctions in Monterey, a non-street legal Ferrari FXX is up on the block and ready to race on the track.

Barrett-Jackson in Scottsdale, Arizona finds Keith Martin and Josh Nasar flexing some muscle with a 1969 Camaro SS and a 1968 Shelby GT-500KR- "King of the Road."

In Monterey at RM Auctions, Josh and Keith take on a one-of-one Bugatti Veyron Grand Sport Vitesse with staggering racing power.

Barrett-Jackson in Scottsdale is the setting for Keith Martin and Josh Nasar as they drive a Porsche 911 Turbo. Crossing the block at RM Auctions in Monterey is a 2003 Ferrari Enzo, inspired by Ferrari's Formula One experience in both looks and power.

Barrett-Jackson in Scottsdale is the place to be for muscle car enthusiasts, and Josh Nasar and Keith Martin find just that with a 1970 Chevelle SS 454 that fires up the crowd, and a very rare 1968 Corvette L89.

Josh Nasar and Keith Martin visit Barrett-Jackson in Scottsdale and Josh test drives a black-on-black Hemi Road Runner with an Air Grabber hood.

RM Auctions in Monterey brings a beautifully-restored 1967 Toyota 2000GT, Japan's daring entry to the two-seater sports coupe market.

Keith Martin and Josh Nasar kick off in Scottsdale at Barrett-Jackson with a legendary Yenko Camaro with tremendous power. The muscle craze continues when Josh hops behind the wheel of a tough Trans Am Super Duty 455.

Keith Martin and Josh Nasar tackle the streets of Fort Lauderdale in a mighty Mustang Boss 302 on offer at Auctions America.