ditto on the 6.0L, but it looks really clean.
The big tell-tale on cosmetics are the seats. If they're nasty and cracked, then it's a deal breaker if the trucks going to be used for family things. Seats on that truck look good; like the bottoms have been replaced. Get a photo of the passenger seat, just to compare.
...and I'm toying with the idea of selling my Ex, but so far I can't decide what I'd replace it with. Here's a shot in case anybody's looking for a bone stock 7.3L with a bit over 160K on her.