Looks like this needs a drop.

Unsolds at 0.66 ref

http://www.tf2outpost.com/trade/26160741 - 3 days

http://www.tf2outpost.com/trade/26157897 - 3 days

http://www.tf2outpost.com/trade/26142817 - 5 days

http://www.tf2outpost.com/trade/26078447 - 7 days

http://www.tf2outpost.com/trade/26081515 - 7 days

http://www.tf2outpost.com/trade/26114873 - 7 days

http://www.tf2outpost.com/trade/26057251 - 14 days

http://www.tf2outpost.com/trade/26064018 - 14 days

http://www.tf2outpost.com/trade/26004055 - 21 days

http://www.tf2outpost.com/trade/26006377 - 21 days

http://www.tf2outpost.com/trade/25900515 - 30 days

Sellers at 0.55 ref

http://www.tf2outpost.com/trade/26183682

http://www.tf2outpost.com/trade/26168226

Seller at 0.44 ref

http://www.tf2outpost.com/trade/26104361

Seller at 0.33 ref

http://www.tf2outpost.com/trade/26183438

bp.tf listings (1 x 0.33 ref, 1 x 0.44 ref, 11 x 0.55 ref and 7 more pages of unsolds at 0.66 ref or more):

Page 1 - http://i58.tinypic.com/r6zrs9.png

Page 2 - http://i60.tinypic.com/29d2t0.png

trade.tf price: 0.55 ref

Credits to aaroncsn for pointing out this still can sell for 0.66 ref and thus leave it in range:

http://backpack.tf/profiles/76561198101892782?time=1434006000 (June 11th)