2007 Ford Expedition EL 4X4 Eddie Bauer - ENGINE NEEDS REPAIRED!!

I am second owner (since Feb 2008) of this2007 Ford Expedition EL 4x4 Eddie Bauerthat recently developed an engine problem that my local Ford Dealer describes as "worn camshaft and phasers".
I've recently purchased a 2012 Expedition EL as a replacement so I'm selling this 2007 Ford Expedition EL 4x4 Eddie Bauer"AS IS, HERE IS" with the engine in need of repairs.
The SUV starts, uns and drives but within 10 to 20 minutes of driving the engine begins running rough and missing. Upon starting the oil pressure gauge rises normally but then drops off to zero. To the best of my knowledge the remainder of the power train (i.e. trans, x4, ifferentials) are in good condition.
This2007 Ford Expedition EL 4x4 Eddie Bauerhas been well maintained with 5,000 mile oil changes, ube & fluid checks.The body is not perfect but is in decent condition except a cracked rear bumper cover & some scratches on the bottom of the passenger door & rocker panel as shown in the photos. There are two dime sized rust spots, ne on the hood and one on the tailgate.
Ithas most available options except navigation & moon roof and everything works except the multi-disc CD player has a disc stuck inside, he mirrors will not power adjust and the power door locks will unlock but will not lock all of the doors at the same time.