Surprisingly needs a raise.

Sale 1: Sold for 28 keys

http://i.imgur.com/xalCBwZ.png -credits to hitemlow

https://backpack.tf/profiles/76561198049254049#!/compare/1460419200/1460592000

credits to ghost soldier for the compare link

Sale 2: Sold for Smoking Bombing Run[13 keys via mini]+Bubbling Western Wear[11 keys via mini]+Genuine Arkham Cowl[1.2 keys]+Genuine Anger[0.7 keys~]

http://backpack.tf/profiles/76561198169455956#!/compare/1461369600/1461456000

13+11+1.2+0.7=25.9 rounding to 26 keys

Sale 3: Quicksold for 18 keys

https://backpack.tf/profiles/76561198238854082#!/compare/1458198000/1458284400

credits to ghost soldier for the link, not the sale :p

Mini on Bombing Run: http://backpack.tf/suggestion/5722e9af86674745ae46cc55

Mini on Western Wear: http://backpack.tf/suggestion/5722eae4c4404551556b8dee

I have sales at 18, 26, and 28. 18 was a quicksale, making this a range of 26-28 keys.