Selling:

http://www.tf2outpost.com/trade/28202271 - b/o: 17 keys (1 day)

http://www.tf2outpost.com/trade/28197498 - b/o: 19 keys (3 days)

Sold:

http://www.tf2outpost.com/trade/28088789

http://backpack.tf/profiles/76561198238854082#!/compare/1461715200/1461801600 - sold for Strange Construction PDA + Strange Original + 1 key = 18 keys

http://www.tf2outpost.com/trade/28202029

http://backpack.tf/profiles/76561198047984328#!/compare/1464220800/1464393600 - sold for Strange Professional Killstreak Australium Axtinguisher = 16 keys

http://www.tf2outpost.com/trade/28061712

http://backpack.tf/profiles/76561198131926681#!/compare/1460332800/1460419200 - sold with 1 key for Bubbling Honcho's Headgear = 12 keys (outlier)

http://backpack.tf/profiles/76561198131926681#!/compare/1460073600/1460246400 - sold with Strange Specialized Killstreak Australium Tomislav + 1 key for Circling TF Logo Noble Amassment of Hats = 22 keys (outlier)