Yeah, see if you can see how many kerbs it's slid into in it's life.
Seriously though, for me, accident damage would be a big one. The earlier ones are known to be very tail happy which translates to people losing control of them. Look for any newer looking suspension components, wheels that have been recut/replaced, tyres that have significantly different manufacturer dates on them, paint variances and panel gap variances.
By earlier ones, which years, and what changed?