Messed up my first suggestion. Sorry about that.There is almost no demand for these anymore. Here is some proof.

Sellers:

[url]http://www.tf2outpost.com/trade/11576140[/url] (My trade, 3 days old, and i just lowered the price to 5 ref each because i need metal)

[url]http://backpack.tf/classifieds/id/76561198055265973[/url] (Only 3 hours old and selling for 1 key)

[url]http://www.tf2outpost.com/trade/11678786[/url] (Only 8 hours old, hasn't been bumped, and selling at 1 key)

[url]http://www.tf2outpost.com/trade/11668560[/url] (18 hours old, hasn't been bumped, and selling at 1 key)

[url]http://www.trade.tf/price/5606/6[/url] (i know it is not really valid proof)

Proof that it is not selling for the current price:

[url]http://www.tf2outpost.com/trade/11636158[/url] (2 days old and selling at 1.2 keys)

[url]http://www.tf2outpost.com/trade/11634770[/url] (2 days old and selling at 1.4 keys)

[url]http://www.tf2outpost.com/trade/11577569[/url] (3 days old and selling at 1.2 keys)

[url]http://www.tf2outpost.com/trade/11626174[/url] (2 days old and selling at high end backpack.tf price)

[url]http://www.tf2outpost.com/trade/11681237[/url] (only 6 hours old and selling at 1.4 keys)

[url]http://www.tf2outpost.com/trade/11608201[/url] (3 days old and selling at the tf2spreadsheet price which is 1-1.5 keys)

[url]http://www.tf2outpost.com/trade/11245512[/url] (2 weeks old and selling at high end backpack.tf price)

Also, as you can see i own 4 of them, and from personal experience, i know how hard it is to sell them.