someone who does to fully check the car over with: compression, turbo condition, electrical, tranny, rear end, when timing belt service was done if unknown the 120k service needs to be done. These cars can be expensive to fix especially if others do the work. The mileage at 106K may be ok provided the car was well maintained. However maintenance and how used are different, so parts still wear out.
The 11,500 G marks listed is about 13000 US which IMO is low for a TT if in good shape.