From my perspective, I think a 100k mile turbo, as long as it has been looked after, is a great buy. Will a 101k mile car really be worth much more than one a year later with 110k on it? I think probably not, and so it could be free from depreciation as its already gone over that "scary" 100k mark.
At least thats my logic and why ive kept my turbo which now has 102k miles on it.
Running costs are a bit hit & miss depending upon how its been looked after. In the first 2 years of running my car, besides a set of tyres and a minor service it only cost me £250 in bits. Which £ per mile over 30,000 miles I felt was good value.
Year 3 and its cost a bit more as ive just had a total front to back inspection and anything worn replaced. Even so, I think that bill came to around £3500. So £3750 over 3 years is still pretty good and the bits ive replaced now should be good for another 100k miles. Its now like a new car.
9e did the inspection and whilst it was there I had them check the turbos & engine over - all got the green light from them, so I had them wave their magic wand over it at the same time.
Im actually finding with its new found performance, the car is actually a lot more useable on my daily commute than it was as stock. It just gets from A to B so quickly, and gets through traffic effortlessly. Even when im stuck in traffic I enjoy that im sitting in a 997 turbo when everyone else is in mondeos. Fuel is the only downer really as a daily, 26mpg.