Sale 1:

https://backpack.tf/profiles/76561198055622215#!/compare/1563667200/1563753600

https://backpack.tf/profiles/76561198447083961#!/compare/1563494400/1563753600

Sold for Stormy Liquidator + 1 key

use there

https://bot.tf/stats/listings/4W6P0O7N

B/O of 15 keys

Sale 2:

https://backpack.tf/profiles/76561198447083961#!/compare/1563494400/1563753600

https://backpack.tf/profiles/76561198957535243#!/compare/1563753600/1563840000

Sold with ~3 keys in sweets for Stormy Trans(17.5)

total is 14.5 keys

Sale 3:

https://backpack.tf/profiles/76561198957535243#!/compare/1563753600/1563840000

https://backpack.tf/profiles/76561198096382522#!/compare/1563753600/1563840000

Can trace 2 keys

Sale 4:

https://backpack.tf/profiles/76561198096382522#!/compare/1563753600/1563840000

https://backpack.tf/profiles/76561198337734785#!/compare/1563753600/1563840000

Sold for ~9 keys

Sale 5:

https://backpack.tf/profiles/76561198337734785#!/compare/1563926400/1564012800

https://backpack.tf/profiles/76561198332465893#!/compare/1563840000/1564012800

Untrace

Sale 6:

https://backpack.tf/profiles/76561198332465893#!/compare/1564790400/1564876800

https://backpack.tf/profiles/76561198042470869#!/compare/1564272000/1564876800

Sold for 12 keys (keys used to buy Sterling)

Sale 7:

https://backpack.tf/profiles/76561198101300189#!/compare/1565481600/1565568000

https://backpack.tf/profiles/76561198971505936#!/compare/1565222400/1565481600

Untrace

Sale 8:

https://backpack.tf/profiles/76561198971505936#!/compare/1565481600/1565568000

https://backpack.tf/profiles/76561198012913578#!/compare/1565481600/1565568000

Untrace

Sale 9:

https://backpack.tf/profiles/76561198012913578#!/compare/1565654400/1565740800

https://backpack.tf/profiles/76561198082350482#!/compare/1565654400/1565740800

https://backpack.tf/profiles/76561198399033192#!/compare/1565568000/1565740800

Untrace

Sale 10:

https://backpack.tf/profiles/76561198399033192#!/compare/1565740800/1567987200

https://backpack.tf/profiles/76561198872092565#!/compare/1554768000/1565827200

https://backpack.tf/profiles/76561198082350482#!/compare/1565740800/1565827200

Untrace

Sale 11:

https://backpack.tf/profiles/76561198082350482#!/compare/1566086400/1566172800

https://backpack.tf/profiles/76561198101300189#!/compare/1566086400/1566172800

Untrace

Sale 12:

https://backpack.tf/profiles/76561198214513491#!/compare/1561680000/1561939200

https://backpack.tf/profiles/76561198267189538#!/compare/1561593600/1561680000

Bulk QS

sale 13:

https://backpack.tf/profiles/76561198139780260#!/compare/1564876800/1565568000

https://backpack.tf/profiles/76561198318531659#!/compare/1564876800/1564963200

Untrace

Sale 14:

https://backpack.tf/profiles/76561198318531659#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198182164258#!/compare/1564012800/1564963200

Sold for ~10 keys

sale 15:

https://backpack.tf/profiles/76561198182164258#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198108050155#!/compare/1565049600/1565136000

Sold for DP Samur-Eye

use there

Sale 16:

https://backpack.tf/profiles/76561198108050155#!/compare/1565049600/1565136000

https://backpack.tf/profiles/76561198912836088#!/compare/1565049600/1565136000

Can trace 2 keys

Sale 17:

https://backpack.tf/profiles/76561198912836088#!/compare/1565049600/1565136000

https://backpack.tf/profiles/76561198370790285#!/compare/1564963200/1565136000

Sold for ~8 keys

Sale 18:

https://backpack.tf/profiles/76561198349181069#!/compare/1565654400/1565740800

https://backpack.tf/profiles/76561198012575480#!/compare/1515456000/1565740800

Sold for 11 keys

sale 19:

https://backpack.tf/profiles/76561198012575480#!/compare/1566345600/1566432000

https://backpack.tf/profiles/76561198257203147#!/compare/1566432000/1566518400

Sold with ~0.5 keys in sweets for OF Topi + 2 keys

use there

Sale 20:

https://marketplace.tf/items/tf2/30182;5;u36

$31.99 / $1.84 = 17.39 keys

Total sales @:

8, 9, 9, 10, 11, 12, 14.5, 17.39 keys

buyers up to 7 keys,

new seller for 14 keys,

gonna exclude 17.39,

taking 9 - 15 keys