Sale 1:

Sold for Misty Skull Stout Shako (44)

No outpost

Seller: https://backpack.tf/profiles/76561198050745352#!/compare/1532476800/1532563200

Buyer: https://backpack.tf/profiles/76561198103764157#!/compare/1532390400/1532563200

https://backpack.tf/item/2797060795

X = 44

Sale 2:

Sold for Dead Presidents Brotherhood of Arms (Suggestion at 38.5) + ~1.5 keys in items

No outpost

Seller: https://backpack.tf/profiles/76561198086948995#!/compare/1534550400/1534636800

Buyer: https://backpack.tf/profiles/76561198099492506#!/compare/1534550400/1534636800

https://backpack.tf/item/3398867361

X = 40

Sale 3:

Sold for 34 keys

Seller: https://backpack.tf/profiles/76561198292156436#!/compare/1534723200/1534809600

Buyer: https://backpack.tf/profiles/76561198072355915#!/compare/1534723200/1534809600

https://backpack.tf/item/2797060795

X = 34

Sale 4:

Sold with 2 keys + some metal for Time Warp Fez

Seller: https://backpack.tf/profiles/76561198072355915#!/compare/1534809600/1534896000

Buyer: https://backpack.tf/profiles/76561198030753137#!/compare/1533772800/1534896000

https://backpack.tf/item/2797060795

Can be used on the Fez, due to lack of sales on the thing.

Other Sales:

#1

Bulk for Green Energy Noble

https://backpack.tf/profiles/76561198103764157#!/compare/1534204800/1534636800

https://backpack.tf/profiles/76561198292156436#!/compare/1534377600/1534464000

https://backpack.tf/item/2797060795

#2

Bulk for Burning Modest

Seller: https://backpack.tf/profiles/76561198114402400#!/compare/1527724800/1527811200

Buyer: https://backpack.tf/profiles/76561198050745352#!/compare/1527724800/1527811200

https://backpack.tf/item/2797060795

Dead Presidents BoA:

https://backpack.tf/suggestion/5b824ce9cf6c752ecd5f3541

Sellers:

https://i.imgur.com/3tyeaGA.png

https://backpack.tf/item/2797060795 - 60 keys

https://backpack.tf/item/3398867361 - 65 keys

Sales at:

34

40

44

Going with 34-44.