So we just heard that the new Ford GT is rumored to cost $400,000. That's a lot of money, so much so that there's only a handful of cars that cost more. Here's what I could think of for production road going cars sold in the US.
Rolls Royce Phantom $408,000 The Rolls flagships starts just barely over 400k
Lamborghini Aventador Roadster $450,000 The base Aventador doesn't even break 400k, but the roadster, anniversary do. Certainly the new SV model will too.
Porsche 918 - $867,000 Naturally the trio of super cars cost more than 400k
McLaren P1 One million plus
Ferrari LaFerrai One Million plus
Bugatti Veyron - One Million plus sold out
Pagani Huayra - One million plus sold out (not really enough units to be a regular production car anyway)
Koenigsegge Agera- One million plus (not really enough units to be a regular production car anyway)