1 of 3 hat

Sale 1 :

Before : http://backpack.tf/profiles/76561198107949914?time=1432882800

After : http://backpack.tf/profiles/76561198107949914?time=1432969200

Sold for a Orb.Planets Spartan + Steaming Maurader = ( 17 * 0.9 ) + ( 15 * 0.9 ) = 28 keys

Mini on the spartan : http://www.tf2outpost.com/trade/25980446 = 17 keys

Sale 2 : http://www.tf2outpost.com/trade/25980944

Before : http://backpack.tf/profiles/76561198081729993?time=1432278000

After : http://backpack.tf/profiles/76561198081729993?time=1432969200

Sold for a miami night cosa nostra cap : 26 keys

Mini for the cosa :

Before : http://backpack.tf/profiles/76561198128363854?time=1432191600

After : http://backpack.tf/profiles/76561198128363854?time=1432278000

Sold for a circling heart handyman's handle : 29 * 0.9 = 26 keys

Therefore a range of 26 to 28 keys looks good.