I have an '05 600RR i bought with 17k. Had no intentions of riding street and turned into a 'tracker' only. Currently at 24k and I have no intentions on selling it so mileage is an afterthought. I'll ride it til it dies.
I got about 40k on my gixxer a combo of street and track...might actually hit that 40k mark this weekend. Done about 60+/- Track Days on it. So far so good. I bought the bike brand new and had it at the track within weeks of purchase. Maintenance is key methinks.
Good luck!