depends on the rider and maintenance... ive heard people say 10k is high miles, and then theres people riding them well past 100k....hell one guy did like 200k on a cbr600 i think... ask for maintenance records, and hope for the best! i think the reason most bikes are sold with low miles, is just because people dont ride them often...nice weather cruising, bar hopping, whatever....i dont think its that they dont last, they just either dont get ridden, or they get wrecked....silverfox is at like 100k on her bike i think and its running good last i heard