$99.97 - Sierra Designs Cochise 15-degree Sleeping Bag
http://www.altrec.com/shop/detail/22588/
A 15-degree rated Polarguard bag at about 3 pounds (3 pounds + 2 ounces to be exact) is a pretty good deal. At just $99.97 and with the great Sierra Designs warranty behind it the Sierra Designs Cochise sounds like a great deal.
It’s 34% off at Altrec.com right now. Only the long, left-zip bad is available, though a few extra inches at this weight is probably good for tossing an extra fleece and dry socks into the bottom to keep them warm for the next morning. Also, left-zip means you use your right hand to reach across your chest to open it, so it’s not a “left-handed” bag.