Sale 1:

Sold for 33 keys

http://www.tf2outpost.com/trade/27918166 - No B/O, seller confirms sale in offers

Seller: http://backpack.tf/profiles/76561198084250500/#!/compare/1459036800/1459468800

Buyer: http://backpack.tf/profiles/76561198050215277/#!/compare/1459382400/1459468800

X = 33

Sale 2:

Sold with Strange Spec. KS Eyelander for Australium Medigun

http://www.tf2outpost.com/trade/27788191 - No B/O

Seller: http://backpack.tf/profiles/76561198067711466/#!/compare/1454313600/1454400000

Buyer: http://backpack.tf/profiles/76561198085288949/#!/compare/1453795200/1454659200

X + 1 = 31

X = 30

Sale 3:

Sold for Disco Beat Down Lucky Shot

No outpost link available

Seller: http://backpack.tf/profiles/76561198259182751/#!/compare/1454745600/1455264000

Buyer: http://backpack.tf/profiles/76561198040313425/#!/compare/1454313600/1454918400

Would rather use this to update the Lucky Shot

Sellers:

31 keys:

http://puu.sh/okmwe/15ff91ab5b.jpg - 5 days, unbumped

33 keys:

http://www.tf2outpost.com/trade/28057513 - 6 days

Sales at:

30

33

Going with 30-33