Be VERY careful. there are way to many GN's with 150k miles being advertised with 50k miles. A good repaint and interior resto might have some buyers fooled. Even if the owner believes they are true miles might not be so. If they were taken when they bought it then they surely believe it is true. I see this way to often. Ya you can do a carfax but if the owner had it long enough and drove it enough it will be very hard to prove.