doesnt matter what these guys pay.
unless they live at same address, same driving history, same car, value, usage, claims history, multi vehicle discounts, other discounts, garaging etc etc blah blah if the price wasnt the same id ask around,
however as everyone is different, everyones premium will be different.
plus its a GTR.
if you had a pre 80s classic with Shannons then you'd be laughing, but an import/GTR in western Sydney - bend over!!