You will want to check the mufflers to see if they are rusting out yet, cause if they aren't after market, they will. Second, take it to a mechanic you trust to do work on a Z to make sure everything is in order. Third try to find one that has a record of maintainence. I noticed that it was easy to find Z's with mileage dividable by 60,000(the big schedualed maintainence). I'm sure there are more important things to look for, but these are what I missed out on when I bought mine...