Re: FreeBitco.in - Contest with $30,000 in GUARANTEED PRIZES now live!
Most of the responses assume that the winner will chose the bitcoins and not the car and that does not answer the question. No reputable dealer will allow anonymous payments I also doubt that Wetsuit somehow achieved the impossible to get a dealership to accept an anonymous Bitcoin payment for the car. 
It's actually quite easy to buy a car through an intermediatory. That's what https://www.moonassets.io/supercars are doing for example. They don't actually sell cars they just handle the Bitcoin to fiat conversion.