What's My Car Worth? - Season 4

Keith Martin and Donald Osborne team up again in Scottsdale, Arizona for the Gooding and Company collector car auction. They found the smoothest ways to cruise across Europe including a very special Ferrari and a very unique Maserati.

Keith Martin and Donald Osborne are in Scottsdale at Gooding and Company's collector car auction. Today they're searching for the biggest and best Mercedes Benz built and it all builds up to the storied 300 SL.

It's a star-studded day at Gooding and Company's Scottsdale auction. Keith Martin and Donald Osborne find and drive a very striking Town and Country as well as a piece of Rat Pack history.

Originality is the question of the day for Keith Martin and Donald Osborne, who are at Gooding and Company's sale in Scottsdale, Arizona. From a classic BMW to an all-original Corvette, the bidders show what originality is worth.

Keith Martin and Donald Osborne take a look at some classic drop tops in Scottsdale, Arizona. Donald goes for a drive in a very impressive Lancia and a world record falls at Gooding and Company's collector car auction. 

Donald Osborne joins Keith Martin at Gooding and Company's collector car auction in Amelia Island, Florida. Today they look at very unique offerings from Europe, from a BMW Isetta to the infamous Porsche 550 Spider.

Gooding and Company's Amelia Island auction gives Keith Martin and Donald Osborne the chance to look at some great cruisers, including a 100-point Jaguar E-Type to a Bentley prewar Bentley that really draws a crowd.

From a Ferrari 365GT to a Porsche Carrera RS, speed is the word of the day for Keith Martin and Donald Osborne as they examine and drive some of the best sports cars on offer at Gooding and Company's collector car auction in Amelia Island, Florida.

Gooding and Company's auction in Amelia Island, Florida is the backdrop for Keith Martin and Donald Osborne to check out some classic European sports cars. A cruise in a Porsche 356B brings them around the corner to one of the most iconic cars ever built.

Keith and Donald are in Auburn, Indiana at Auctions America for some American automotive icons. Later, dealers Peter Klutt and Mark Hyman listen to JP's sales pitch for his Good Humor ice cream truck. Will JP's dreams of a big sale melt away or will the guys come running at the ringing of the bells?

We are in Auburn, Indiana at Auctions American with Keith and Donald ready to test Detroit's muscle on the road and on the block. Later, Mark and Peter listen to Tom pitch his Boss 429, but does his Mustang have enough muscle to break the bank or will his tires squeal onto the block at no reserve?

Donald and Keithbreturn to Auctions America in Auburn, Indiana to cruise in one the last of the big Cadillac convertibles. Later on collector car dealers Mark and Peter listen to the pleas of Kurt, who's selling his 190 SL and hoping to avoid hitting the auction block at no reserve.

Keith and Donald are back at Auctions America in Auburn, Indiana to drive some American automotive excellence. Later, dealers Peter and Mark meet Robbie, whose Buick is about to cross the block with no reserve. Can Robbie sell the guys on his Riviera and save himself from a gamble at auction?