Sold for Green Confetti Le Party Phantom (33) + 5 keys:

http://backpack.tf/profiles/76561198110025008?time=1445065200 (October 17th)

http://backpack.tf/profiles/76561198110025008?time=1445151600 (October 18th)

http://backpack.tf/profiles/76561198110025008?time=1445151600&compare=1445065200

http://backpack.tf/profiles/76561198016820211?time=1445065200 (October 17th)

http://backpack.tf/profiles/76561198016820211?time=1445151600 (October 18th)

http://backpack.tf/profiles/76561198016820211?time=1445151600&compare=1445065200

33 * .9 + 5 = 34.7 keys

~35 keys

Sold with Strange Specialized Killstreak Australium Black Box (18) + Cloud 9 Ground Control (23) for Stormy Storm Le Party Phantom (25) + Midnight Whirlwind Taunt: Skullcracker (49):

http://www.tf2outpost.com/trade/27180497

http://backpack.tf/profiles/76561198059701085?time=1444287600 (October 8th)

http://backpack.tf/profiles/76561198059701085?time=1444374000 (October 9th)

http://backpack.tf/profiles/76561198059701085?time=1444287600&compare=1444374000

49 + 25 - 23 - 18 = 33 keys

Complicated sale

Sold for Nuts n' Bolts Killer Exclusive (32) + 2 keys:

http://www.tf2outpost.com/trade/27175022

http://backpack.tf/profiles/76561198052246700?time=1443942000 (October 4th)

http://backpack.tf/profiles/76561198052246700?time=1444028400 (October 5th)

http://backpack.tf/profiles/76561198052246700?time=1444028400&compare=1443942000

32 * .9 + 2 = 30.8 keys

~31 keys