This sounds really sus, like its been smashed in the front end. look at the bolts fastening the front quater panels. Also look at any other bolts that fasten panels to see if they are new or are freshly painted over. Loof at the fmic mounts, pipe hose clamps etc. Have a look down the side of the car to see for straightness. check the hose clamps and fastners etc on the engine too for replaced parts. Be very very careful mate! good luck, hope you can find a good GT-R!
-rb25