I wouldn't really call this albinoe as their is still color around the edges of the fish itself. Seems more like it would be a pie bald, interesting fish either way but man no way I would shell that out for a yellow tang.
I didn't know RHS was even back open but I agree with BMW on this one, what an ugly fish. First thing that comes to my mind is to ask what's wrong with it and I don't think that's the idea of a $2500 fish.
I have even seen a few of these fish myself. At first I thought the condition represented partial albinism of some sort, presumably caused by a genetic variation. In support of this, Dr. John E. Randall writes: