One of the advantages of buying a car AT 100k miles is that you'll have a pretty good idea what the condition will be like at 110k miles...and the odds of getting to 200+k miles 🙂
...because miles, like sampling, improves predictability. If a car runs great and is fit and tight fitting @ 100k, it has a proven track record and is unlikely to fall apart 10k miles later...and will as likely, if properly maintained, "go the distance"...