Sale 1

Sold mine for 46 usd on the market. Less than a week

46+46/1.15 equals 86

86/2 equals 43

43/2.5

Total 17 keys, if you want 40/2.5 equals 16. I took a calculation example from here http://backpack.tf/vote/details/5647fdc8b98d887c38e94be4

Sale 2

Sold for 16 keys in less than a week

Before

http://backpack.tf/profiles/76561198023218344?time=1441982445

After

http://backpack.tf/profiles/76561198023218344?time=1442214000

Compare

http://backpack.tf/profiles/76561198023218344?time=1442214000&compare=1441954800

Sale 3

14 keys. Quicksale less than a week

Before http://backpack.tf/profiles/76561198044116220?time=1441609200

After http://backpack.tf/profiles/76561198044116220?time=1441782000

http://backpack.tf/profiles/76561198044116220?time=1441609200&compare=1441782000

Sale 4

Strange Dead Presidents Big Chief 19 keys. 19*0.9 give 17.1 so 17 keys. Sold in 3 days.

Before http://backpack.tf/profiles/76561198149200886?time=1440140400

After http://backpack.tf/profiles/76561198149200886?time=1440226800

http://backpack.tf/profiles/76561198149200886?time=1440140400&compare=1440226800

Sale 5

Sold for Proffessional RL. 12.5 keys. 12.5*0.9 equals 11.25 keys

http://www.tf2outpost.com/trade/27280903

Current sellers

One is here and in outpost for 18 keys. It was listed 25 days ago. This is the only seller in outpost at the moment.

The other one is selling for 16 keys. It was listed a day ago.

Screenshots

https://imgur.com/a/gBMZR

Taking 17 keys since they are selling for that in less than a week