Lets face it, many of the Z32s out there are going to have 60K, 80K, 100K miles on them. If you're going to mod a Z and put possibly $3K to $5k into one, I sure wouldn't want to start out spending twice blue book for one. For me, paint condition is at the top of the list...and make sure it idles right. AC work can get very expensive...test it thoroughly. Heat too. Check passenger floor board for any signs of previous wetness.