I am going all synthetic.
This is my Nunatak Arc Ghost 32 Degree bag. It has the .85 fabric with blue shell/black exterior.
I used it 3 nights last summer in a tent. It is in excellent condition, no stains, tears, rips, etc. I am asking $275 shipped via USPS Priority. I am listed on eBay as e-rockclimbing and have a goog rating there. I can send pics to your email if you like. Or you can contact me thru eBay to verify my rating.
I can do PayPal as well.