look into the cateras numbers. that is probably the closest you will find if the gtos are not published.
when we were looking for a four door three years ago the volvo dealer tried to scare us into a volvo. when i got the offer on my legend coupe for a trade,i asked why her used volvo was so much more than retail, and my acura less than trade in value when my acura was rated better by every agency. safety was her reply. i said thats in the price, why the difference. volvo safety.
thats when i decided to put my wife and then unborn childs life in grave danger and look at something other than volvo. the olds dealer offered me more than trade in for the legend, and i didnt want to trade it in. i sold it to a co worker. he too is driving in grave danger.