I had the same thought process (must be sub 80k miles, etc) when looking for my GT Tdi. A garage (v hub in Cheltenham) had one with just over 100k on the clock but 1 owner and FSH. "Out of interest" I looked at it........I bought it and 10 months in am sooooo glad I did!!! Comprehensive servicing and a good owner are paramount, cars with much lower mileage than mine are in far inferior conditions.
Good luck.