Trade # 1 http://www.tf2outpost.com/trade/22029181

It was offered on a quickbuyer trade for 11 keys. Sold for 11 keys.

Trade - 1 http://www.tf2outpost.com/trade/22453166 (My trade)

Sold it for 14 keys . http://goo.gl/MaZJra

Trade # 3 http://www.tf2outpost.com/trade/22616237

Sold for around 12 keys. The unusual owners buyout was originally 11 keys.

Trade # 4 http://imgur.com/ThvXZj9 - Purchased at 10.5 keys.

Trade # 5 http://www.tf2outpost.com/trade/21924689

Sold for an unknown amount. Declined 12 keys.

Its easily possible to get 12 keys or 14 keys. However, with a few sales at 11 keys will keep that in the range, they did sell very quick however.