A true unicorn car! 1/20 Lamborghini Sesto Elemento, the Gallardo-based, track only hypercar weapon as seen on Top Gear. This is the only UK-based car and belongs to a very impressive collection. Costing $2.7 million new, the car is likely to have appreciated in value since, and has recently been sold by The Octane Collection. Built almost entirely of carbon fibre, the Sesto has a kerb weight of just 999 kg, making it a very capable track toy.