Hey mate,
Having recently been in the same position as you i can certainly give you a few tips.
Firstly, CONGRATS ON CHOOSING A 4 DOOR!!!!!!
A few things to look for,
Tow points front and rear, make sure they line up and are not bent, good sign of a yank out of a ditch etc.
Rear main gearbox seal, (mine was leaking) usually from old age but they can get distorted from "dropping the clutch" and start dripping gearbox oil, cheap to fix but a good indicator of abuse etc.
Hoses are usually ready for replacement too, mine were........
Check all buttons in the car and on the dash actually work..... worth checking believe me.
Other than that, make sure you give it a good test drive.
Keep in mind its and old car and will need stuff done to it to keep it on the road.
Good luck and have fun!