Even the lowest of miles GN/T/GNX will have problems with the headliners.It's the age of the glue that is breaking down,not the miles of the car.Going out into the sun,or being stored in a place where the temp fluctuates considerably will also accell the sagging of it.I just looked at a 13k mile GN this weekend,super nice car,but the whole entire headliner is down!!!!
My 82k mile GN held out until about 4 years ago,I pulled it outside for the day with the windows up,and when I got in it that night,it was down !!!!! One day !!!!
With that,the replacement was alittle different in color,but the average person looking at it won't know.