In fact, it should be 0.33-0.66 ref. But I was too lazy to suggest that after doing the other haunted souls. I think I could help with the proof.

its haunted because he doesnt have a soul. this range is too high too

http://www.tf2outpost.com/trade/5613555 (0.33 ref)

http://www.tf2outpost.com/trade/5738292 (0.33 ref)

http://www.tf2outpost.com/trade/5604477 (0.33 ref)

http://www.tf2outpost.com/trade/5746694 (0.44 ref)

http://www.tf2outpost.com/trade/5823787 (0.44 ref)

http://www.tf2outpost.com/trade/5677911 (0.55 ref)

http://www.tf2outpost.com/trade/5810998 (0.66 ref)

http://www.tf2outpost.com/trade/5752003 (0.66 ref)

http://www.tf2outpost.com/trade/5772895 (0.66 ref)

http://www.tf2outpost.com/trade/5623696 (0.66 ref)

http://www.tf2outpost.com/trade/5770017 (0.66 ref)

http://www.tf2outpost.com/trade/5807609 (0.66 ref)