Also, there's rather a lot more 350z's around now than there was say 4 or 5 years ago when some of us purchased the first 350's. Flooding the market = loss in our value. Unfortunately that's life.
Different ways to consider it though, if you're like me, and purchased new to keep the car, then it only matters if it's written off.
But for most people it would probably be a toy for a few years, broad generalisation here, so your value matters more against whatever your next toy is.