The rise to prominence of SLI and Crossfire means video cards retain value a lot easier and longer, and if the manufacturers don't make enough of them to the point where there are still a ton available a year later...You see the result. Those are the same exact card. The good news, however, is that you can use any 7950 with the same clock speeds (or even just make sure the clock speeds match) and use Crossfire with it.
"VICTORYYYYYYY!" -Johnny Drama