Sales:

35 keys pure:

https://gyazo.com/9c01c55eba2efe213567afc40ee277eb

Bulk demonflame milkman

http://backpack.tf/profiles/76561198142466037/#!/compare/1457337600/1457424000

Sold for an unusual medi gun

http://backpack.tf/profiles/76561198120421288/#!/compare/1457251200/1457424000

Resold for a spec aussie medgun ~32

http://backpack.tf/profiles/76561198120421288/#!/compare/1457938800/1458025200

~32

Sold for blizz ballcap (~22?)

http://backpack.tf/profiles/76561198067008321/#!/compare/1456732800/1456819200

http://backpack.tf/profiles/76561198147149994/#!/compare/1456732800/1456819200

Ballcap is outdated, but probably lower than 30

may have been sold for beams counter

http://backpack.tf/profiles/76561198075574945/#!/compare/1455955200/1456387200

hard to tell because histories are weird here, but it had a buyout of 30:

http://www.tf2outpost.com/trade/27771237

As far as I can see, the dude that bought it for 35 resold it for 26:

http://www.tf2outpost.com/trade/27833512

http://backpack.tf/profiles/76561198142390772/#!/compare/1457424000/1458111600

Sold for orbfire phantom ~30

http://backpack.tf/profiles/76561198259518713/#!/compare/1455177600/1455264000

Sold for bubbling vrh ~15 + steaming cyborg ~14

http://backpack.tf/profiles/76561198277595328/#!/compare/1454745600/1454832000

~29

Sold for flies yellow belt ~40

http://backpack.tf/profiles/76561198098548490/#!/compare/1454486400/1454745600

belt is outdated as well

I will exclude the 40 and 22 sales as outdated/outliers.

Thanks to Foamy the Fearsome for the help :)