Good to see you are looking at 370s
I have noticed poor colour matching on panels on a few 370s but those were all white. There was often a distinct cream vs white distinction. Not seen any problems with other colours but can't say I've been looking. Where they all older cars that you looked at?
Welcome, there is a meet in your rough direction if you want to see a nice collection of zeds to help you decide
http://www.350z-uk.com/topic/79960-the-woodman-meet-2nd-feb-2014-11am/
It's nice to be rare on the road
Local dealer who deals with gtrs said the 370 roadsters are like gold dust, long waiting times for brand new and second hand.