If you're lucky enough to have something exotic like the Ferrari Monza SP2 tucked up in your garage, a point of pride certainly has to be the exclusivity and rarity that comes along with it. Indeed, all the finest supercars and classics are often highly limited. The Ferrari Enzo, for instance, was limited to just 400 examples.

But every now and then, something pops up for sale that gives true meaning to the definition of rarity. Take the Bizzarrini Kjara. First seen in 1998, this unique concept car was never slated for production, but rather served as a study to preview how legendary designer Giotto Bizzarrini would design a modern sports car. As such, just one was ever created and now, it's up for grabs.

Listed for sale on carandclassic.com, the Kjara was a collaboration between the famed designer and Leone Martellucci from the University of Rome. As you'd expect from the man who penned the gorgeous Ferrari 250 GTO, the "barchetta" boasts futuristic styling, with several similarities to the little-known Renault Sport Spyder. The angular front end flows into curvaceous bodywork. There's no roof or, indeed, a proper windscreen - a quirkily-styled wind deflector is all you get.

Large air vents sited behind the doors suck air into the engine bay where yet another surprise is to be found. Instead of a throaty V8, or a powerful twin-turbo V6, the Kjara concept utilizes a 2.4-liter five-cylinder turbodiesel engine sourced from a period Lancia. Amazingly, it was originally connected to four electric motors but, sadly, the hybrid system has since been disconnected. Not only was Bizzarrini a trailblazer of design, but clearly dabbled in futurology, too.

The interior is best described as spartan. Two leather-trimmed seats, an aftermarket steering wheel, and some gauges do their best to uplift the austere cabin, but there's not much in the form of creature comforts. Then again, Bizzarrini designed it to be a preview of a futuristic sports car, not a luxury cruiser. Up close, it's apparent that the Kjara doesn't present as factory fresh. A few minor issues will have to be addressed, with a few exterior and interior trim pieces looking worse for wear.

It comes as no surprise that this Netherlands-based car is listed as POA (Price On Application). The history and rarity will undoubtedly attract seriously wealthy car collectors who will, likely, dish out copious amounts of cash for this motoring scarcity. Elsewhere, the Bizzarrini name has been resurrected, with the company now reviving the iconic 5300 GT sports car as the Revival Corsa.