My first suggestion :D

Unsolds

http://www.tf2outpost.com/trade/14458719 - 4 weeks

http://www.tf2outpost.com/trade/15010521 - 1 day

http://www.tf2outpost.com/trade/14901800 - 6 days, no offer on the dead ringer

http://www.tf2outpost.com/trade/14901800 - 3 weeks, no offer on the dead ringer

http://www.tf2outpost.com/trade/14959539 - 3 days

http://www.tf2outpost.com/trade/14625967 - 2 weeks

http://www.tf2outpost.com/trade/15007032 - 2 days

http://www.tf2outpost.com/trade/14974236 - 3 days, selling for .22 ref

http://www.tf2outpost.com/trade/14971464 - 3 days

http://www.tf2outpost.com/trade/14741723 - has another for .33 not sold yet, 2 weeks

http://www.tf2outpost.com/trade/15039345 - 1 day

http://www.tf2outpost.com/trade/15016256 - 1 day, no offers

http://www.tf2outpost.com/trade/14864915 - 1 week, no offers

http://www.tf2outpost.com/trade/14980635 - 2 days

http://www.tf2outpost.com/trade/14429866 - 4 weeks, .44 each

http://www.tf2outpost.com/trade/14960182 - 3 days, selling at backpack.tf's price (.33)

http://www.tf2outpost.com/trade/14605651 - 3 weeks, 50 dead ringers as a set. Had an offer of 10 ref (Worth 16.55 ref~)

http://www.tf2outpost.com/trade/14907729 - 6 days, .22

http://bazaar.tf/trade/463893 - 1 week

Solds

http://www.tf2outpost.com/trade/14725910 - Not in his/her backpack

http://www.tf2outpost.com/trade/14741723 - Sold one for .33 ref

Buyers (Only a few buyers on outpost)

http://www.tf2outpost.com/trade/15046018 - Buying for .22, none in his bp

http://www.tf2outpost.com/trade/13347627 - Buying for .22, one add, not in the buyer's bp

http://www.tf2outpost.com/trade/14585795 - Buying any vintages for .11, one in the buyer's bp

Conclusion: One year old price, a tricky item to sell at times, only a few may buy it.

Any extra proof or counter proof is welcomed