Sale 1:

https://backpack.tf/profiles/76561198125791160#!/compare/1560902400/1560988800

https://backpack.tf/profiles/76561198214513491#!/compare/1560816000/1560988800

Sold for 17 keys

sale 2:

https://backpack.tf/profiles/76561198214513491#!/compare/1561507200/1561593600

https://backpack.tf/profiles/76561198054198170#!/compare/1561420800/1561507200

Bulk

Sale 3:

https://backpack.tf/profiles/76561198054198170#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561197992703391#!/compare/1563321600/1563408000

Untrace

Sale 3:

https://backpack.tf/profiles/76561197992703391#!/compare/1563408000/1563494400

https://backpack.tf/profiles/76561198149634917#!/compare/1563408000/1563494400

https://backpack.tf/profiles/76561197992703391#!/compare/1563408000/1563494400

https://backpack.tf/profiles/76561198078373457#!/compare/1563408000/1563494400

Untrace

Sale 4:

https://backpack.tf/profiles/76561198078373457#!/compare/1563667200/1563753600

https://backpack.tf/profiles/76561198116799484#!/compare/1563667200/1563753600

Bulk

sale 5:

https://backpack.tf/profiles/76561198116799484#!/compare/1563753600/1563926400

https://backpack.tf/profiles/76561198010993339#!/compare/1563494400/1563753600

Untrace

Sale 6:

https://backpack.tf/profiles/76561198010993339#!/compare/1563840000/1563926400

https://backpack.tf/profiles/76561198057636635#!/compare/1564272000/1564444800

untrace

Sale 7:

https://backpack.tf/profiles/76561198090956917#!/compare/1563148800/1563321600

https://backpack.tf/profiles/76561198273681900#!/compare/1563148800/1563321600

Untrace / QS

Sale 8:

https://backpack.tf/profiles/76561198273681900#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198026873115#!/compare/1563494400/1563667200

Untrace

sale 9:

https://backpack.tf/profiles/76561198026873115#!/compare/1563667200/1565308800

https://backpack.tf/profiles/76561198358111400#!/compare/1562371200/1564704000

Untrace

Sale 10:

https://backpack.tf/profiles/76561198358111400#!/compare/1565395200/1565481600

https://backpack.tf/profiles/76561198088500522#!/compare/1565308800/1565395200

Sold for Blizzardy Geezer + 4 keys

use there

Sale 11:

https://backpack.tf/profiles/76561198088500522#!/compare/1565395200/1565481600

https://backpack.tf/profiles/76561198071082937#!/compare/1565395200/1565481600

Sold for 23 keys (18 used to buy Cyborg)

Sale 12:

https://backpack.tf/profiles/76561198071082937#!/compare/1565654400/1565827200

https://backpack.tf/profiles/76561198088171813#!/compare/1565740800/1565827200

Sold for ~15 keys

sale 13:

https://backpack.tf/profiles/76561198088171813#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198105305615#!/compare/1565740800/1565827200

Keys

sale 14:

https://backpack.tf/profiles/76561198105305615#!/compare/1566000000/1566086400

https://backpack.tf/profiles/76561198064646061#!/compare/1566000000/1566086400

Keys

sale 15:

https://backpack.tf/profiles/76561198064646061#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198134639553#!/compare/1566777600/1566950400

Sold for ~4 keys in sweets for TW Cannonball

use there

Sale 16:

https://backpack.tf/profiles/76561198052246700#!/compare/1561075200/1561161600

https://backpack.tf/profiles/76561198337734785#!/compare/1561075200/1561161600

QS

Sale 17:

https://backpack.tf/profiles/76561198337734785#!/compare/1561680000/1561766400

https://backpack.tf/profiles/76561198293727875#!/compare/1561680000/1561766400

Keys

Sale 18:

https://backpack.tf/profiles/76561198090520837#!/compare/1567468800/1567555200

https://backpack.tf/profiles/76561198336898193#!/compare/1567468800/1567555200

Untrace

Sale 19:

https://backpack.tf/profiles/76561198336898193#!/compare/1567555200/1567641600

https://backpack.tf/profiles/76561198337143855#!/compare/1567468800/1567555200

Untrace

Sale 20:

https://backpack.tf/profiles/76561198436103721#!/compare/1564531200/1564876800

https://backpack.tf/profiles/76561198317418604#!/compare/1564704000/1564876800

Sold for 12 keys

Sale 21:

https://backpack.tf/profiles/76561198317418604#!/compare/1564876800/1564963200

https://backpack.tf/profiles/76561198825943127#!/compare/1564790400/1564963200

Sold for 16 keys

Sale 22:

https://backpack.tf/profiles/76561198825943127#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198199803242#!/compare/1564963200/1565049600

Sold for keys....

Sale 23:

https://backpack.tf/profiles/76561198199803242#!/compare/1564963200/1565049600

https://backpack.tf/profiles/76561198928347702#!/compare/1564963200/1565049600

Sold for ~13 keys

Sale 24:

https://backpack.tf/profiles/76561198928347702#!/compare/1565654400/1565740800

https://backpack.tf/profiles/76561198269337198#!/compare/1565740800/1565913600

Sold for 14 keys

sale 25:

https://backpack.tf/profiles/76561198025970990#!/compare/1561334400/1561593600

https://backpack.tf/profiles/76561198415525729#!/compare/1561507200/1561593600

Bulk

Sale 26:

https://backpack.tf/profiles/76561198415525729#!/compare/1561507200/1561593600

https://backpack.tf/profiles/76561198847672167#!/compare/1561507200/1561593600

Sold for ~14 keys

Sale 27:

https://backpack.tf/profiles/76561198847672167#!/compare/1561593600/1561680000

https://backpack.tf/profiles/76561198068910184#!/compare/1561593600/1561680000

Sold for ~14 keys

Sale 28:

https://backpack.tf/profiles/76561198068910184#!/compare/1561680000/1561766400

https://backpack.tf/profiles/76561198128126194#!/compare/1561507200/1563062400

Untrace

Sale 29 - 32:

https://marketplace.tf/items/tf2/110;5;u36

$32.99 / $1.84 = 17.93 keys

$34.99 / $1.83 = 19.12 keys

$30 / $1.80 = 16.67 keys

$27.78 / $1.82 = 15.26 keys <-- https://backpack.tf/item/875114365

Total sales @:

12, 13, 14, 14, 14, 15, 15.25, 16, 16.67, 17, 17.93, 19.12, 23 keys

Buyers up to 15 keys,

taking 15 - 19 keys, calling 23 high. keeping 15 due to large amount of sales under it.