Perhaps it's not quite ready for that straight up 4 ref jump - but here's a more conservative increase.

I'll include this for clarity, but please note:

Unbumped for 6 days:

http://www.tf2outpost.com/trade/22539535 - bp.tf price

Quicksells for 3 ref:

http://www.tf2outpost.com/trade/22616339

http://www.tf2outpost.com/trade/22631821 - bp.tf price

Sold for 3.66 ref:

http://www.tf2outpost.com/trade/22564730

Sold for 4 ref:

http://postimg.org/image/89c7h79jx/ - credit to M@nny

Buyer for 3.33 ref:

http://www.tf2outpost.com/trade/21352036

Buyers for 3.66 ref:

http://www.tf2outpost.com/trade/22621302

http://www.tf2outpost.com/trade/22062483

Buyer for 4 ref:

http://www.tf2outpost.com/trade/22554103

Several Haunted Sleeves are in sets or painted, and can't be counted. All feedback is appreciated. I know this is a really weird item to price, but this should be enough proof for a bump.