Make sure all the body lines match up.
Get on the ground and check the frame for rust.
While on the ground check the CV boots to make sure they aren't ripped.
Feel the brakes for firmness.
Turn the wheel all the way both directions and listen for squeaking or pops.
Take it on the highway and jump on it, make sure nothing shakes and theres no odd noises.
Get on it from a stop for the same things.
Press all the buttons and make sure all the electronics work, especially the sunroof if it has one. Completely open and close it 3-5 times just to be sure its working properly.
Check door hinges for rust also.