What to look for

Run your hand up under the rear wheel well and feel for rusting out, sometimes you can't tell jut by looking. Look for body panel alignment especially in hte rear, as the unibody is hard to fix right, and it's a sure sign it was in a wreck, also knock on the rear half listening for a dull sound, that would be bondo. Lift up the spare tires, and look for dirt, water, debris, a good sihn that the seals are giong out. alos under the front carpet you should be able to stick you hand down under it from in front of hte pedals, check for the same thing. Civics have a tendency to leak after a few years, and can develop trouble spots you can't see.