Rust in the trunk extensions
Yup, default for these cars. Lower quarters, trunk floor/extensions and rear window are just about 100% givens. Then rockers and interior floor usually need attention as well, as well as lower front fenders.
...but it is all worth it in the end. What I really nice is most of the metal for these cars is reproduced. That makes repairing them much cheaper (note I did NOT say cheap!).