Sale 1:

https://backpack.tf/profiles/76561198180871546#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198870947042#!/compare/1566777600/1566950400

Sold for Cool Woodsy WW SMG

use there

Sale 2:

https://backpack.tf/profiles/76561198205415264#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198208162248#!/compare/1562112000/1562284800

Sold for 8 keys

Sale 3:

https://backpack.tf/profiles/76561198208162248#!/compare/1562112000/1562284800

https://backpack.tf/profiles/76561198834854798#!/compare/1562198400/1562284800

Sold for ~10 keys

Sale 4:

https://backpack.tf/profiles/76561198834854798#!/compare/1564876800/1565222400

https://backpack.tf/profiles/76561198382290208#!/compare/1565395200/1565481600

https://backpack.tf/profiles/76561198210225228#!/compare/1565395200/1565481600

Untrace

Sale 5:

https://backpack.tf/profiles/76561198210225228#!/compare/1565568000/1565654400

https://backpack.tf/profiles/76561198931721599#!/compare/1565654400/1565827200

SCM

Sale 6:

https://backpack.tf/profiles/76561198931721599#!/compare/1566172800/1566345600

https://backpack.tf/profiles/76561198173175225#!/compare/1566259200/1566345600

Can trace 5 keys

sale 7:

https://backpack.tf/profiles/76561198173175225#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198377165880#!/compare/1566604800/1566691200

Sold for Roaring Yeti

not updatable, sales mostly over aged unsold.

Sale 8:

https://backpack.tf/profiles/76561198973894950#!/compare/1565049600/1565136000

https://backpack.tf/profiles/76561198108853200#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198063536945#!/compare/1531440000/1565136000

Untrace / bulk / Gambling(?)

Sale 9:

https://backpack.tf/profiles/76561198063536945#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198870453692#!/compare/1565827200/1566000000

https://backpack.tf/profiles/76561198370411292#!/compare/1565913600/1566000000

https://backpack.tf/profiles/76561198243320176#!/compare/1565913600/1566000000

Untrace / SCM

Sale 10:

https://backpack.tf/profiles/76561198355199281#!/compare/1567036800/1567036800

https://backpack.tf/profiles/76561198110145092#!/compare/1566345600/1567641600

SCM

Sale 11:

https://backpack.tf/profiles/76561198045778293#!/compare/1565827200/1566691200

https://backpack.tf/profiles/76561198024898002#!/compare/1566086400/1566172800

Untrace

sale 12:

https://backpack.tf/profiles/76561198118391968#!/compare/1568937600/1569024000

https://backpack.tf/profiles/76561198374206487#!/compare/1568937600/1569024000

Sold with ~4 keys in sweets for Steaming Brass

Brass Mini:

https://backpack.tf/suggestion/5d8b0c47d381720b4e3fe7dc

Suggestion for 10 keys

Total is 6 keys

Sale 13:

https://backpack.tf/profiles/76561198374206487#!/compare/1569024000/1569110400

https://backpack.tf/profiles/76561198287282539#!/compare/1568937600/1569110400

https://backpack.tf/profiles/76561198163955706#!/compare/1569024000/1569110400

Untrace

Sale 14, 15:

https://marketplace.tf/items/tf2/255;5;u60

$16 / $1.84 = 8.70 keys

$16 / $1.82 = 8.79 keys <-- https://backpack.tf/item/7955753540

Total sales @:

6, 8, 8.5, 9, 10 keys

Buyers up to 6 keys,

https://i.imgur.com/EWCvZ9K.png

calling 6 low,

taking 8 - 10 keys