Cant realy comment on the price, as its a personal thing.
IE if you REALY want it, then its up to you.
But just think on , the cam/chain/slipper job will cost you in excess of £1K...Cams were about £300-£500 each. Then theres the cost of fitting. The chain is about £30 ish + the slippers about £5-£10 each. ALL prices are aproximate, so check before buying.
If they need doing,that is,,
Sometimes you get lucky, but in my experience, they will need sorting at this sort of milage if they have never been checked. You might get lucky + find its only one cam you need...
PS the cam job was never a Porsche recomended service item. So was never on the list of jobs to check at service time.
Have the brake calipers been checked/fixed for plate lift, as this is another tedious job that will cost about £150 per caliper...
Its says the sills have been replaced.? Is that just the outer sill , as they generally rust on the inside around the rear torsion beam mounts aswell.????
Oh and what condition are the fuel lines in, they corrode around the rear axle + front inner wing areas,,, too....[8|][8|]
PS.
Dont want to put you off, its just these cars , even though they look REALY nice on the surface can be hiding a multitude of challenges under the skin,,,costing £££££££££ to fix....