At first glance I thought this Ghost Pontiac had just been dressed up in x-ray style decals, but I suppose the clue's in the name. Made in 1939 from plexiglass, it was the US' first transparent car.
Given the transparent nature of plexiglass, the creators took special consideration of each of the components inside, with the metal bars given a nice copper wash, and the rubber moldings painted white to match the tires. After a few careful owners since '39, it's going to hit the auction room later this year, where it's expected to make up to $US475,000 - owing not only to its unique style, but also to the fact it's only clocked up 130km on the odometer. [RM Auctions via AOL via Born Rich]