Just whisper the name "McLaren" and you know you're talking about something expensive. Just how expensive depends on which model you're talking about. McLaren sold all 375 examples of the P1 at $1.15 million. The 12C coupe starts just under $240k and the 12C Spider at $265k. The upcoming P13 should come in around $160k, and the P15 around $500k. But how much will the new 650S set you back?