Leaks, play in diff's, transfer case and gearbox.
When viewing a defender, I would advise the use of one of those pipe inspection cameras. You want to check as much of the chassis as possible. They can rust from the inside out.
Check the rear cross member.
If its been used for work, check the condition of all bushings. They wear out and it could add up if your having to do lots of little jobs.
Nasty smells that can never be got rid of. Ask me how I know about that.
72 Chevy C10 Stepside 350
90 318is Sold
02 530i Touring Sport
83 E21 320/6 - Sold
84 316 - Sold
85 528i - Sold