The non factory seam is very pronounced in that photo. In the ebay link, I couldn't clearly tell whether the factory seam was there or not.
Two or more years ago, I heard that the offshore source was having problems forming the area under the headlight. And if you study that area, you can appreciate that it is difficult to form. Maybe that extra seam, or moving it, was their way of getting around their difficulty.
I wouldn't have a problem with it on a modified car, because I'd cut and weld the seam to get rid of it.
Still, it makes you appreciate a factory fender in good shape. And depending on your location, you should still be able to pick one up for less than those go for.