It's not unknown for there to be convertible versions of Ferrari's iconic 12 cylinder sports cars. They are rare, sure, but they do exist. Ferrari recently brought the format back themselves with the 812 GTS, a roadster version of the 812 Superfast. However, the format had been out of production for decades before the 812 GTS came around and, because this is Ferrari after all, some of Ferrari's most affluent customers did place demands for such a car to be built.
Step forward Zagato, who (in their final collaboration with Ferrari), created this absolutely incredible version of the already rare 550 Barchetta, one of only five that were ever made. Zagato totally rebodied the car, creating a new shape that was inspired by their previous creation the 575 GTZ. Why they based it on the 550 Barchetta instead of the newer and probably more obviously suitable 575 Superamerica I don't know, but the end result is stunning regardless. At the time, one of these incredible almost one-off machines would have set you back about $1.6 million dollars.
This example is up for sale at Bonhams' in New Bond Street, London, with a curiously low estimate of £500k-£700k (about $770k). This is surprisingly low considering by all definitions the car is almost priceless and its purchase price was well into the millions when it was new! However, rare cars like this have been known to sell for more in the salerooms at Bonhams. Earlier in the year they were tasked with shifting a Koenigsegg One:1 (one of only 6 made) and estimated it at $1.8-$2.3 million - the car ended up selling for $4.6 million, more than double that price! I wouldn't be surprised if the same situation happened with this Ferrari.