Sale 1:

https://backpack.tf/profiles/76561198241644844#!/compare/1543536000/1543622400

https://backpack.tf/profiles/76561198363149044#!/compare/1543536000/1543622400

Sold for Smoking Bombing(8)

Sale 2:

https://backpack.tf/profiles/76561198363149044#!/compare/1543795200/1546473600

https://backpack.tf/profiles/76561198305255030#!/compare/1544400000/1545091200

SCM

Sale 3:

https://backpack.tf/profiles/76561198305255030#!/compare/1545177600/1545696000

Untrace

Sale 4:

https://backpack.tf/profiles/76561198337734785#!/compare/1547856000/1547942400

https://backpack.tf/profiles/76561198257305890#!/compare/1546819200/1547942400

Keys

Sale 5:

https://backpack.tf/profiles/76561198257305890#!/compare/1547942400/1548028800

https://backpack.tf/profiles/76561198348057478#!/compare/1547856000/1548028800

Not fully traceable

Sale 6:

https://backpack.tf/profiles/76561198348057478#!/compare/1547856000/1548028800

https://backpack.tf/profiles/76561198305147533#!/compare/1547942400/1548028800

Bulk

Sale 7:

https://backpack.tf/profiles/76561198305147533#!/compare/1548115200/1548547200

https://backpack.tf/profiles/76561198183165447#!/compare/1548460800/1548547200

Untrace

Sale 8:

https://backpack.tf/profiles/76561198183165447#!/compare/1548460800/1548547200

https://backpack.tf/profiles/76561198337734785#!/compare/1548460800/1548547200

QS

Sale 9:

https://backpack.tf/profiles/76561198006544512#!/compare/1542931200/1543017600

https://backpack.tf/profiles/76561198277435514#!/compare/1542931200/1543017600

Sold for ~8.5 keys

Sale 10:

https://backpack.tf/profiles/76561198277435514#!/compare/1542931200/1543017600

https://backpack.tf/profiles/76561198104134966#!/compare/1542844800/1543017600

Bulk

Sale 11:

https://backpack.tf/profiles/76561198104134966#!/compare/1543104000/1543190400

https://backpack.tf/profiles/76561198144136965#!/compare/1543104000/1543190400

Untrace

Sale 12:

https://backpack.tf/profiles/76561198144136965#!/compare/1543276800/1543536000

https://backpack.tf/profiles/76561198047231832#!/compare/1543449600/1543536000

Sold for Spell

Sale 13:

https://backpack.tf/profiles/76561198047231832#!/compare/1543449600/1543536000

https://backpack.tf/profiles/76561198155110999#!/compare/1543536000/1543622400

QS to Bot

Sale 14:

https://backpack.tf/profiles/76561198808612658#!/compare/1550188800/1550275200

https://backpack.tf/profiles/76561198826254247#!/compare/1550102400/1550275200

Sold with 2 keys for KaW Bloke's

Use there

Sale 15:

https://backpack.tf/profiles/76561198826254247#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198101179137#!/compare/1550448000/1550534400

Sold for 8 keys

Sale 16- 19:

https://marketplace.tf/items/255;5;u36

$16.39 / $1.66 = 9.87 keys

$14.20 / $1.74 = 8.16 keys

$14.93 / $1.73 = 8.63 keys

$17.49 / $1.8 = 9.72 keys

Total sales @:

8, 8.16, 8.5, 8.63, 9.72, 9.87 keys

Sellers down to 9 keys,

Buyers up to ~7.5 keys

Taking 8 - 8.5 keys