Saw this thread a few weeks ago and was waiting for someone to hit the nail on the head. Very good point above, when it comes down to cars - in most cases, you get what you pay for.
Im shopping for an R34 GTR at the moment, Ive had 3 or 4 offered to me for around the 36 - 37k mark, however these were for obvious reasons.
I'd rather hold out and spend the required $45k - $55k for a fantastic example, rather than just settling for something average.