Help with my Elise purchase

Hey up. I’m looking for an Elise. I’ve had a standard and a 111s in the past but these where both new and that was a couple of years ago. I’m gonna buy a 2nd hand one this time. What are your views on which year, known probs to look for, what to avoid etc. Any help would be champion as I will be buying private. Cheers in advance. Dickster.