Well they're none of the issues I've come across and I've worked on a few other than my own, but I'll try and be of some use!

The rough cold running could be down to a number of things, but they have a limiter fitted basically to discourage you from leathering a cold engine - is it actually 'jerking' or does it just feel hesitant? There's also a known mapping issue whereby the car feels like it has a slight misfire at 2-2.5K revs, I think this would be evident on a warm engine too mind. I suppose it would be nice to believe the seller and put it down to having been stood but still....

The usual issues are well documented, the IMRC, broken heat shields, clutch etc - all that sort of stuff will have been covered on here I'm sure.

Is the timing belt due for renewal? I don't know how handy you are with the spanners, it's not the most difficult job but it'll be a few hundred if you pay a garage. You really don't want the tensioner breaking obviously.

The other thing that seems to affect some is rust in the rear arches - I waxoyle my '170 the same as I do the Capri and Granada!

Good luck with the search, I'm sure the right car is out there, there's plenty of them!