Donald Trump's fire-engine red, 2007 Ferrari F430 F1 Coupe went on the auction block Saturday and traded hands for $270,000. That was below the top price of $350,000 it was expected to fetch, but well above the $180,000 or so the car probably cost when it was new.

Reading about the president and his cars always brings a smile to my face because we spent the better part of a spring afternoon in 2005 together driving around Palm Beach in one of his earlier Ferraris. It was fun.

I was staying with Trump at Mar-a-Lago for the weekend, preparing to write his biography, "TrumpNation: The Art of Being the Donald." On a Saturday morning, I found him standing next to a red Ferrari in the club's cobbled driveway. He was dressed for golf and holding up his car keys.