Since I re-suggested the Sombrero, best to re-suggest this as well.

Sale 1: Sold for Death by Disco Smokey Sombrero[67 keys via mini]

http://backpack.tf/profiles/76561198062425416/#!/compare/1456732800/1456819200

Sale 2: Sold with two other unusuals for Poisoned Shadows Anger

http://backpack.tf/profiles/76561198120481051/#!/compare/1454313600/1454400000

Should be used to price the Anger.

Sale 3: Sold for Frostbite Jumper's Jeepcap[60 keys via mini]+13 keys

http://www.tf2outpost.com/trade/27912015 b/o was 62 keys

http://backpack.tf/profiles/76561198087373387/#!/compare/1456905600/1457078400

60+13=73

b/o was 62, so capping it there.

Mini on Sombrero: http://backpack.tf/vote/id/56ed7314ba8d884339186347

Mini on Frostbite Jumper's Jeepcap:

Sold for Haunted Ghosts Headwarmer[55 keys via mini]+5 keys

http://backpack.tf/profiles/76561197970977889/#!/compare/1455177600/1455264000

55+5=60

Mini on Headwarmer:

Sold for Strange Australium Scattergun[39.5 keys]+15 keys

http://backpack.tf/profiles/76561198075491803/#!/compare/1455091200/1455177600

39.5+15=54.5 rounding to 55 keys

So I've got sales at 62 and 67, making a range of 62-67 keys.