Sun roof? Checl for rust around it. I don't think you can check these at the time or purchase, but some common problems I have run into on my daughter's car:
Vehicle Speed Sensor - these go bad, speedometer stops working amount other dash items. Pretty easy to replace, just awkward.
Main Relay? (or is it fuel pump relay) - In hot weather the car will start and then die quickly. It will not start again (but turns over). This relay controls the fuel pump so no fuel - no start

. Pretty easy to replace, up under the driver's side dash.
Oil leaking near the oil filter. There are several spots in this area that can leak. Parts are not expensive, but hard to get to.
Not sure if it's common, but our '92 radiator was leaking last year. Easy to replace.
Good luck and they are great cars.