The only picture disc of Wish You Were Here (to the knowledge of the Pink Floyd Encyclopedia, anyway) was released in the First XI box set. It was pressed in 1979, and was not contemporary with the album's real release in 1975.

I have no idea of its value, however. I haven't seen many of these picture discs around; but that may be because I'm located in the U.S. and this box set was only released in England.