Consider the usual caveats..
1) age.. 15-20 year old cars - depending on how bought, it could need a whole host of items repaired/replaced from cosmetic to mechanical
2) IMS - when this fails, you know have a V8 conversion to ponder
3) Regular maintenance costs - Tires, Brakes, Oil changes, fuel etc.
4) Choose your trans - Tip or Manual?
They are great cars.. They perform very well. But the engines have issues.. some will never have an issue, the other 10-20% will have a full meltdown.