http://www.tf2outpost.com/trade/9797039 2 people selling at 12 keys 1 person

selling at 13 keys

http://www.tf2outpost.com/trade/9842783 selling at 12 keys

http://www.tf2outpost.com/trade/9835440 selling at 12 keys

unsold

14 keys

http://www.tf2outpost.com/trade/9721101 5 days

http://www.tf2outpost.com/trade/9838089 15 hours

http://www.tf2outpost.com/trade/9834282 19 hours

http://www.tf2outpost.com/trade/9802872 2 days

http://www.tf2outpost.com/trade/9798236 2 days

http://www.tf2outpost.com/trade/9784655 2 days

http://www.tf2outpost.com/trade/9805074 1 day

http://www.tf2outpost.com/trade/9838251 1 day offer of 13k supposingly

13 keys

http://www.tf2outpost.com/trade/9841107 11 hours

http://www.tf2outpost.com/trade/9801483 2 days

http://www.tf2outpost.com/trade/9841004 11 hours

http://www.tf2outpost.com/trade/9851622 2 hours

Many people selling at 14 keys and 13 keys with little luck. People already starting to sell at 12 keys. from the proof no one buying at 14, highest offers are at 13 and are scarce. ergo range of 12 - 13.