Would any one know what the approximately Market Value of a R32 GTS-T Skyline? According to the Insurance Companies....

How long is a piece of string.

There could be as much as 50% variation depending on mileage, condition, manual vs auto, coupe vs sedan, etc etc.

Best bet if you dont agree with what your insurer says is to get one or two appraisals from independant parties e.g. car dealer, compliance shops etc.