Western Mountaineering Bison V 800 fill power down bag for sale

I have a Western Mountaineering Bison V available for sale. Slept in it no more than 4 nights total. The bag retailed for around 800.00 USD when purchased. This is a full on expedition-grade bag rated for -40 degrees using the best quality 800+ fill power down. The Gore shell is not a full on waterproof breathable membrane, but is designed to let out sweat vapor and keep out condensation from the snow cave or mountaineering tent.

Western Mountaineerings comparable bag is about 1100.00 these days. I'm looking for 600.00 usd. This bag will take you pretty much anywhere in the world, up to 8000 meters or full on winter conditions in the White Mountains, Rockies or Sierras.