This is a 1:8 scale model of a Lamborghini Aventador, built by Robert Gülpen (pictured), and being auctioned at Sotheby's with a starting bid of €3.5 million (about $4.789 million). The model is encrusted with $2.7 million worth of precious stones and metals, and it took Mr. Gülpen 500 hours to make. Fun fact: a real Aventador only costs $379,700, but where's the fun