Two reference edition Sapphire 6950's as shown in the photos, one XFX one ATI from an open air mining rig that I've had operating for the past 9 months. Card were operated at stock speeds and never over temp, they are in excellent condition.
One card has the shaders unlocked, I forget which one off the top of my head, the other has not been modified.
$450 (or BTC equivalent) for both including shipping via Priority Mail out of the Seattle area. I'll include the crossfire cable and one 16x PCIe riser cable. I will guarantee against DOA and will promptly refund any returned card.