Don't buy salvage unless you can get it looked at professionally,
But if you're going to do it anyways... run your finger along the body panels cracks and see if anything is mis-aligned, it's a sure sign of damage to other things than what he was talking about, such as bullshitting you and there was more damage than that, or if the frame bent somewhere out of sight, or if it was concealed.
get underneath and look for any cracks to the subframe in the back.
Open the trunk and tear away the carpet and look for shitty repairs or welds, not sure what the trunk looks like on these cars but you should be able to see some signs of damage in there if it is worse than advertised.
