Just bear in mind AA inspection will only do so much, a knowledgable 370z owner from here going with you to look at it will know more about common problems than any AA guy with a checklist. Does the AA checklist include tell tale signs of oil gallery gaskets for example? Have you read up about the steering lock issue? Etc.
If you want it, go for it. Cars like this are not about saving money, but its also not worth wasting money as well. Only buy at a price you feel happy with, don't buy it because its cheaper than other ones. Also worth having a slush fund - say a thousand or so back in case of any immediate issues that come up.