In my experience, garages know that small automatic cars are a premium so start off requesting a high price and then offer discounts if it hasn't moved after 60 days, or take a reduced offer if it makes them a profit. After 90 days the cars will be off to auction to get their money back, so make them an offer.
112,000 miles is hardly run-in, my car had more than that on its first MOT, reliability shouldn't be an issue unless you are unlucky.
The I-shift isn't as smooth as the CVT gearbox but its not bad once you get used to it, and pretty good especially if you haven't tried the CVT.