Bought and sold this a few times so might as well update it.

Sale 1: Untraceable

http://backpack.tf/profiles/76561198045846606#!/compare/1494547200/1494892800

Sale 2: Sold together with 4 keys + Strange Spec KS Bread Bite (~1.6) for Circling Peace Towering Pilar (29) --> 23.4; rounding to 23 keys.

http://imgur.com/a/QZyfs

Mini Towering: Sold for 13 keys pure + Bubbling Bear Necessities (10.25) + Victory Lap (3) + ~2.75 keys in items --> 29.

http://backpack.tf/profiles/76561198211995121#!/compare/1492732800/1492819200

Micro Bear: 10.25 keys http://backpack.tf/profiles/76561198094964657#!/compare/1492905600/1492992000

Sale 3: Sold for Ace High Mongolian (10) + 2 keys + buds (2) + Capper (2) + Taunt Carlton (1) --> 17 keys

http://imgur.com/a/GjCm5

Mini Mongolian: http://backpack.tf/suggestion/592aa264e3387759421637d4

Sale 4: ~14.5 keys pure; rounding to 15

http://imgur.com/a/0IUGv

Sale 5: Sold together with 10 keys pure +~1 key in items for Neutron Star Winter Woodsman (49) --> 38 keys

http://backpack.tf/profiles/76561198049896889#!/compare/1492819200/1492905600

Mini Woodsman: ~49 keys on marketplace https://marketplace.tf/items/30549;5;u107

Sales at 15, 17, 23, 38

Unsold at 17 for 1 month

http://i.imgur.com/u4stCvC.png

Suggesting range from 15-17. 23 & 38 are too high with unsold at 17.