This needs a drop.

Classified ads at the time of posting:

http://m.imgur.com/3FETwQH

http://backpack.tf/classifieds?item=Force-A-Nature&quality=11&tradable=1&craftable=1&australium=1

1*11 keys

5*12 keys (3 have Specialized Killstreak, 1 has Killstreak and 3 have parts attached)

2*13 keys (Both have Specialized Killstreak, 1 has parts attached)

1 buy order at 11.26 keys

2 buy orders at 11 keys

Unsolds at 13 keys:

http://www.tf2outpost.com/trade/27468741 (~3 weeks)

http://www.tf2outpost.com/trade/27571611 (Has Specialized Killstreak, young)

Unsold at 12.5 keys:

http://www.tf2outpost.com/trade/27535102 (~1 week)

Unsold at Backpack.tf price:

http://www.tf2outpost.com/trade/27486264 (Has parts, ~2 weeks)

Sellers at 12 keys:

http://www.tf2outpost.com/trade/27551117 (~6 days old)

http://www.tf2outpost.com/trade/27553075 (Has Killstreak, ~6 days old)

http://www.tf2outpost.com/trade/27499231 (Has Specialized Killstreak, ~2 weeks old)

This is all I could find on Outpost that are valid at the time of posting this suggestion.