Hi all, I have 2x 5970s up for sale.  Currently part of an underclocked & undervolted rig, so no overheating issues whatsoever in the 3 months that I have owned them.  I bought them new OEM, so the cards still have their 5 year warranty.
Price is 80 BTC each + actual shipping (~2-3 BTC shipped anywhere in the US).  Buy both of the cards for 160 BTC and get free shipping.