http://www.tf2outpost.com/trade/10247892 offer of ts bills plus 3, black eas plus 6, both around 12 keys

http://www.tf2outpost.com/trade/10008382 many offers of 12 to 12 plus keys

http://www.tf2outpost.com/trade/10346777 offer of 13 pure for the mongol on second post

http://www.tf2outpost.com/trade/9830137 2 13 key offers 1 pure one not.

mother of all proof :P http://www.tf2outpost.com/trade/9717664 he buys any unusual thats not gifted for 12 keys

because of people above know unusual should be under 11 keys. i have personally sold 2 of these for 13 keys or 13 keys in items. Please make a recommendation if you have one thank you