Should also check the spare wheel well for water (i.e. close the boot grab a jug of water and pour it near the lights etc and where there are gaps) anything that leaks in is because of worn out sealing should get it fixed asap or rust away without a clue
i bought my r33 from northshore prestige in balgowlah.. did an nrma inspection thing, they identified every problem and the company fixed it and it was checked again ($340 it cost me) and ive run my car for over 2 years and has never ever missed a beat
and when i mean they checked everything it even included noting a crack in the s2 plastic cover for the headlight which they also fixed ^_^
they will tell u if its been in a major or minor accident
check suspension
tyres
wheels
all electronics and engine was gone over throughly
at the time they had an exhaust on my car which wasnt sturdy and this too was noted also noted the exhaust was too loud but i didnt want that fixed