^^ as long as its genuine , not an issue for me
a well oiled and maintained toyota /daihatsu engine is good for 250000 miles atleast. so even 80 or 90k km on the odo should not be a problem
i drove a 90000km driven grade 4 prius the other day, the feel was good as new
to answer your question, a " high " IMO should be above 125k km