Sale 1:

https://backpack.tf/profiles/76561198002757046#!/compare/1562457600/1562544000

https://backpack.tf/profiles/76561198148464161#!/compare/1562457600/1562544000

Sold for 9 keys

Sale 2:

https://backpack.tf/profiles/76561198148464161#!/compare/1562716800/1562803200

https://backpack.tf/profiles/76561198106795971#!/compare/1562716800/1562803200

Untrace

Sale 3:

https://backpack.tf/profiles/76561198106795971#!/compare/1562803200/1563321600

https://backpack.tf/profiles/76561198150526374#!/compare/1562544000/1562889600

Sold for 9 keys

Sale 4:

https://backpack.tf/profiles/76561198150526374#!/compare/1563148800/1563235200

https://backpack.tf/profiles/76561198178388042#!/compare/1563148800/1563235200

Sold with 2 keys for DP Tailor

use there

Sale 5:

https://backpack.tf/profiles/76561198102318448#!/compare/1564531200/1566604800

https://backpack.tf/profiles/76561198002757046#!/compare/1566259200/1566345600

QS

Sale 6:

https://backpack.tf/profiles/76561198002757046#!/compare/1566691200/1566777600

https://backpack.tf/profiles/76561198375057502#!/compare/1565222400/1566950400

keys

Sale 7:

https://backpack.tf/profiles/76561198163031219#!/compare/1561766400/1561939200

https://backpack.tf/profiles/76561198213674613#!/compare/1561766400/1561939200

Sold for Miami Crack

use there

Sale 8:

https://backpack.tf/profiles/76561198213674613#!/compare/1561939200/1562025600

https://backpack.tf/profiles/76561198171199266#!/compare/1561852800/1562025600

Sold for 9 keys

Sale 9:

https://backpack.tf/profiles/76561198171199266#!/compare/1562025600/1562112000

https://backpack.tf/profiles/76561198096507227#!/compare/1562025600/1562112000

Sold for ~8.5 keys

Sale 10:

https://backpack.tf/profiles/76561198096507227#!/compare/1562025600/1562112000

https://backpack.tf/profiles/76561198337734785#!/compare/1562025600/1562112000

QS

Sale 11:

https://backpack.tf/profiles/76561198337734785#!/compare/1562112000/1562198400

https://backpack.tf/profiles/76561198029074524#!/compare/1562112000/1562198400

Sold for 9 keys

Sale 12:

https://backpack.tf/profiles/76561198055350282#!/compare/1560643200/1561420800

https://backpack.tf/profiles/76561198045069599#!/compare/1561161600/1562025600

Sold for Miami Coupe + ~0.75 keys in sweets

Coupe Mini:

https://backpack.tf/suggestion/5d8bbd6767807217a47e0299

Suggestion for 9 keys

Total is ~10 keys

Sale 13:

https://backpack.tf/profiles/76561198046393528#!/compare/1562803200/1562889600

https://backpack.tf/profiles/76561198089689746#!/compare/1562803200/1562889600

Bulk

Sale 14:

https://backpack.tf/profiles/76561198089689746#!/compare/1562803200/1562889600

https://backpack.tf/profiles/76561197970381831#!/compare/1562889600/1562976000

Sold for Smoking Commando(10)

Sale 15:

https://backpack.tf/profiles/76561197970381831#!/compare/1562976000/1563408000

https://backpack.tf/profiles/76561198277758965#!/compare/1562889600/1562976000

Keys?

Sale 16:

https://marketplace.tf/items/tf2/184;5;u34

$15.11 / $1.83 = 8.26 keys

$18.85 / $1.80 = 10.47 keys <-- https://backpack.tf/item/1778734197

$18.85 / $1.82 = 10.36 keys

Total sales @:

8.26, 8.5, 9, 9, 9, 9, 10, 10, 10.36, 10.47 keys

taking 8.5 - 10.5 keys