Another one.

3 recent sales, duped. 2 years outdated.

Sale 1:

http://backpack.tf/profiles/76561198211674749#!/compare/1482710400/1482796800

http://imgur.com/a/ATmx4

http://imgur.com/a/mDeoh

Sold for 40 keys pure.

Sale 2:

http://backpack.tf/profiles/76561198208576396#!/compare/1481932800/1482278400

Sold for a Stormy Storm Dapper's and like 10 keys of sweets.

Calling this one a high outlier.

Sale 3:

http://backpack.tf/profiles/76561198208576396#!/compare/1482624000/1482883200

1:1 with a TF Logo Chieftan's Challenge.

Calling this one a low outlier.

Excluding sales 2 & 3 since the user bought it for pretty high then sold it for pretty low.

Rolling with 40 flat.

Thanks Troll Pumpkin!