Sellers:

https://marketplace.tf/items/330;5;u59

http://www.tf2outpost.com/trade/29038029

http://www.tf2outpost.com/trade/29064406 - 1 at $20.49 = 10 keys (1 day), 1 at $21 = 10 keys (6 days), 1 sold at $20.99 = 10 keys

http://www.tf2outpost.com/trade/28863841 - b/o: 9 keys (1 month)

Sales:

http://imgur.com/a/5BeGc

http://backpack.tf/profiles/76561198061108999#!/compare/1493683200/1493769600

http://www.tf2outpost.com/trade/28889590 - sold for Orbiting Fire Doctor's Sack = 9 keys b/o

http://www.tf2outpost.com/trade/28845935

http://backpack.tf/profiles/76561198043967350#!/compare/1490486400/1491177600 - ?

http://backpack.tf/profiles/76561198159855421#!/compare/1489104000/1489190400

http://backpack.tf/profiles/76561198309404155#!/compare/1488931200/1489190400 - sold for Nuts n' Bolts L'homme Burglerre = 10 keys

http://www.tf2outpost.com/trade/28868660

http://backpack.tf/profiles/76561198329103477#!/compare/1491696000/1491955200 - ?

http://backpack.tf/profiles/76561198372403271#!/compare/1491523200/1491609600 - sold for 8 keys

http://www.tf2outpost.com/trade/28859737

http://backpack.tf/profiles/76561198203058248#!/compare/1491091200/1491264000 - sold for 7 keys (quicksold)

http://backpack.tf/profiles/76561198262604439#!/compare/1489190400/1489276800

http://backpack.tf/profiles/76561198101528282#!/compare/1488499200/1489276800 - sold for Bubbling Elf Esteem = 10~ keys

http://www.tf2outpost.com/trade/28813872

http://backpack.tf/profiles/76561198128606394#!/compare/1488844800/1489190400 - sold for 1 key + bunch of sweets = 8 keys

Mini's:

Nuts n' Bolts L'homme Burglerre:

http://www.tf2outpost.com/trade/28785621

http://backpack.tf/profiles/76561198342161127#!/compare/1488672000/1488758400

http://backpack.tf/profiles/76561198309404155#!/compare/1488672000/1488758400 - sold for Strange Australium Frontier Justice = 10 keys