Sale 1:

Sold for Dead Presidents Bonk Boy (mini at 33)

No outpost

Seller: http://backpack.tf/profiles/76561198030050182#!/compare/1470960000/1471046400

Buyer: http://backpack.tf/profiles/76561198087853188#!/compare/1470960000/1471046400

X = 33

Sale 2:

Sold for 30 keys

http://www.tf2outpost.com/trade/28449467 - B/O of 35

Seller: http://backpack.tf/profiles/76561198110660907#!/compare/1471305600/1471478400

Buyer: http://backpack.tf/profiles/76561198011134507#!/compare/1472601600/1472774400

http://puu.sh/qX8Ms/5dfdd8b525.png

http://puu.sh/qX8O8/c20e3c803a.png

X = 30

Sale 3:

Sold for Terror-Watt Milkman in about a day

http://www.tf2outpost.com/trade/28423268 - B/O of 17

Seller: http://backpack.tf/profiles/76561198087320176#!/compare/1471305600/1471392000

Buyer: http://backpack.tf/profiles/76561198204824055#!/compare/1471305600/1471392000

Should cap at B/O

Bonk Boy Mini: – Credit to Numb: http://backpack.tf/suggestion/57c53e2c8667470c800e5a7d

Sale 1:

Sold for Bubbling Tough Stuff Muffs

No outpost

Seller: http://backpack.tf/profiles/76561198202339421#!/compare/1471305600/1471392000

Buyer: http://backpack.tf/profiles/76561198175893725#!/compare/1471305600/1471392000

X = 36 keys.

Sale 2:

Sold for Vivid Plasma Bombing Run + 16 keys pure.

http://www.tf2outpost.com/trade/28423732 - B/O of 33

http://backpack.tf/profiles/76561198175893725#!/compare/1471478400/1471564800

X = 33 (Capped by B/O)

Sale 3:

Sold for Pro. KS Aussie Scattergun

http://www.tf2outpost.com/trade/28427021 - B/O of 30

Seller: http://backpack.tf/profiles/76561198020674825#!/compare/1471651200/1471737600

Buyer: http://backpack.tf/profiles/76561198119634347#!/compare/1471737600/1471996800

X = 30 (Capped by B/O)

Sales at:

17

30

33

17 looks like an outlier, as it sold in about a day, and there is a pure sale at 30 keys

Going with 30-33