Looks like 44-50 keys might be a more accurate drop. Thanks to Randy and Jacobmeister for the sales.

Sale 1:

Apparently sold for a KS Aussie RL http://backpack.tf/item/3783193480

Sale 2:

Sold for a duped Haunted Ghosts Master's Jarate Belt

Before - http://backpack.tf/profiles/76561198062040298?time=1436770800

After - http://backpack.tf/profiles/76561198062040298?time=1436966115

Mini:

Sold for a Knifestorm Bone Dome and a Max's Severed Head. B/O was 50 keys so taking that.

http://backpack.tf/profiles/76561197983525329?time=1436770800

http://backpack.tf/profiles/76561197983525329?time=1437116400

http://www.tf2outpost.com/trade/26465929 - knifestorm bone dome (48 * 0.9 = ~43) + max's head (24.5 at the time) = 67.5, B/O was 50

Invalid sale 1:

Sold for a Pro KS Australium Wrench http://backpack.tf/item/3669113063 (http://backpack.tf/item/3886017495 also is relevant)

http://backpack.tf/profiles/76561198131084455?time=1436338800 - after (before cannot be shown since backpack.tf did not record when it was unboxed)

Taking 35.83 keys *.9, taking 32 keys.

Invalid sale 2:

"Sold for a Miami Brown Bomber ~ 67 Keys

http://www.tf2outpost.com/trade/26454256

Before - http://backpack.tf/profiles/76561198118874885?time=1436759226

After - http://backpack.tf/profiles/76561198118874885?time=1436770800

Mini for the Bomber -

Sold with a Orbiting Fire Stately Steel Toe for a Death at Dusk Belgian Detective ~ 67 Keys

before - http://backpack.tf/profiles/76561198118874885?time=1436827725

After - http://backpack.tf/profiles/76561198118874885?time=1437116400

"

Taking 44-50 keys since 32 and 67 seem to be outliers.