Selling:

http://www.tf2outpost.com/trade/28552370 - b/o: 13 keys (4 months)

http://www.tf2outpost.com/trade/28591784 - b/o: 13 keys (2 months)

Sold:

http://www.tf2outpost.com/trade/28528960

http://backpack.tf/profiles/76561198087448314#!/compare/1476230400/1476403200 - sold for Orbiting Planets Hetman's Headpiece + 4 keys = 14 keys b/o (outlier)

http://backpack.tf/profiles/76561198211063493#!/compare/1475798400/1475884800 - sold for items = 8 keys (outlier)

http://backpack.tf/profiles/76561198120847750#!/compare/1479427200/1479513600 - sold for 13 keys

http://www.tf2outpost.com/trade/28534469

http://backpack.tf/profiles/76561198066950212#!/compare/1476230400/1476316800 - sold for items = 9 keys (outlier)

http://backpack.tf/profiles/76561198106520426#!/compare/1475884800/1475971200 - sold for Strange Specialized Killstreak Festive Ambassador + 2 keys = 6 keys (outlier)

http://www.tf2outpost.com/trade/28472904

http://backpack.tf/profiles/76561198199967883#!/compare/1473206400/1473292800 - sold with sweets for Circling Peace Sign Magistrate's Mullet = 10 keys (outlier)

http://www.tf2outpost.com/trade/28472713

http://backpack.tf/profiles/76561198199967883#!/compare/1472860800/1473206400 - sold for 10 keys + sweets = 11 keys

Mini's:

Circling Peace Sign Magistrate's Mullet:

seller in classies for 12 keys