We're used to seeing the 911 R being overvalued at $1 million, but it turns out it isn't the only limited-edition Porsche that can command unbelievably high price tags. Recently at the Amelia Island auction of Gooding & Co, a rare 2011 example of the Porsche 997 GT3 RS 4.0 was sold for an incredible $748,000. There are reasons for its rarity, but it still doesn't justify the shockingly steep price. Only 158 examples were built for the US, 36 of which were painted black.

This particular model is one of only two black examples that have the factory audio delete option checked. The 997 GT3 RS 4.0 that was sold had only done 136 miles since it was delivered, making it practically brand new. It was also kitted out with an extensive list of optional extras which added another $12,000 to its original price.

These options included a red model designation on the engine lid, a front-axle lifting system, clear taillights, leather-covered steering column and rear console, and carbon fiber on the B-pillars. But what makes the 997 GT3 RS 4.0 so special is that it has the largest flat-six engine of any road-legal 911, producing 500 horsepower at 8,250 rpm, allowing it to accelerate from 0–60 mph in 3.5 seconds. While the recent reveal of the new Porsche 911 GT3 with an optional manual gearbox at no extra cost should knock down the asking prices of the 911 R which sold for over three times its original value, it seems there will always be a sought-after Porsche people can make a profit on.