Take a look at the drivers side door/rear cab corner. This looks suspect to me. It looks like a little bubbling under the paint on the door and the cab corner doesn't quite line up with the door. Also looks like some sanding marks under the paint. I'm no body man, so am hoping someone on here will chime in.
Door:
![Image](http://i246.photobucket.com/albums/gg83/michael9218/Ford%20F100/image_zpszqzn7wxn.jpeg)
Underside of cab corner:
![Image](http://i246.photobucket.com/albums/gg83/michael9218/Ford%20F100/image_zpsydqeoudp.jpeg)
Also look at the rust in the roof seam at the back of the cab. Is this a big issue or an easy repair?
![Image](http://i246.photobucket.com/albums/gg83/michael9218/Ford%20F100/image_zpswo0atbjl.jpeg)