Smile. We're all mad here.

Sale 1:

https://backpack.tf/profiles/76561198044347430#!/compare/1534636800/1534809600

Sold for HG Woolen Warmer(91)

Sale 2:

https://backpack.tf/profiles/76561198182213262#!/compare/1534550400/1534636800

https://backpack.tf/profiles/76561198155659357#!/compare/1534550400/1534636800

Sold for Tesla Woodsman + Stormy Phantom(31)

Woodsman Mini:

https://backpack.tf/suggestion/5bb81bc244325a2945438b0a

Suggestion for 46 keys

Total is 77 keys

Sale 3:

https://backpack.tf/profiles/76561198135388328#!/compare/1534809600/1534896000

https://backpack.tf/profiles/76561198099136395#!/compare/1534809600/1534982400

Sold for 50 keys (ID Match)

Sale 4:

https://backpack.tf/profiles/76561198099136395#!/compare/1535155200/1535241600

https://backpack.tf/profiles/76561198152901910#!/compare/1535068800/1535155200

Sold for 53 keys

Sale 5:

https://backpack.tf/profiles/76561198135388328#!/compare/1535587200/1535673600

https://backpack.tf/profiles/76561198247025190#!/compare/1535500800/1535760000

Sold for 100 keys? high.

Sale 6:

https://backpack.tf/profiles/76561198247025190#!/compare/1537747200/1537833600

https://backpack.tf/profiles/76561198039731024#!/compare/1537747200/1537833600

Sold for Stormy KE

KE Mini:

https://backpack.tf/suggestion/5bba4339cf6c7522eb6d4a53

Suggestion for 61 keys

Sale 7:

https://backpack.tf/profiles/76561198039731024#!/compare/1537920000/1538006400

https://backpack.tf/profiles/76561198407541175#!/compare/1537920000/1538006400

Sold for Isotope FN Lighnting Rod Shotgun(58)

Sale 8:

https://backpack.tf/profiles/76561198407541175#!/compare/1538006400/1538092800

https://backpack.tf/profiles/76561198018719204#!/compare/1536364800/1538092800

Can ID Match some keys

Sale 9:

https://backpack.tf/profiles/76561198018719204#!/compare/1538092800/1538179200

https://backpack.tf/profiles/76561198356834968#!/compare/1538092800/1538179200

Untrace.

Sale 10:

https://backpack.tf/profiles/76561198356834968#!/compare/1538179200/1538265600

https://backpack.tf/profiles/76561198094730000#!/compare/1538179200/1538265600

Untrace.

https://backpack.tf/item/5984855115

Can't trace the rest here.

Sale 11:

https://marketplace.tf/items/30067;5;u18

Sold for 90 USD,

Keys at 1.80 USD

Total is 50 keys

Total sales @:

50, 50, 53, 58, 61, 77, 91 keys

Taking 61 - 77 keys

The below suggestion will have my and mods reasoning:

https://backpack.tf/suggestion/5b9d8c4344325a6d9a771c2e