I have the answer. Nissan charge roughly £20 hinch, so that £40 for each door. Scrap yard charged me £5 for both.... If you do get from a scrap yard, rock the doors and make sure they don't feel like yours, try and look for a 5-door one, as the doors are much lighter= less ware on hinches. Just as good as new if you find the right ones, and you need to remove the wing to get to them
Edit: Sloper, yes it will