Sale 1:

https://backpack.tf/profiles/76561198182795337#!/compare/1568592000/1568678400

https://backpack.tf/profiles/76561198035601010#!/compare/1568592000/1568678400

Sold with ~0.5 keys in sweets for 12 keys

Total is ~11.5 keys

Sale 2:

https://backpack.tf/profiles/76561198394877897#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198331412517#!/compare/1569801600/1569888000

Sold for 11 keys

Sale 3:

https://backpack.tf/profiles/76561198331412517#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198101300189#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198089253101#!/compare/1569801600/1569888000

Untrace

Sale 4:

https://backpack.tf/profiles/76561198400168157#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561198328749364#!/compare/1558224000/1567296000

Sold for 11 keys

Sale 5:

https://backpack.tf/profiles/76561198067198241#!/compare/1566864000/1567036800

https://backpack.tf/profiles/76561198080179568#!/compare/1566950400/1567036800

QS

Sale 6:

https://backpack.tf/profiles/76561198317420068#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198117011535#!/compare/1562889600/1563062400

Untrace

Sale 7:

https://backpack.tf/profiles/76561198117011535#!/compare/1564617600/1564704000

https://backpack.tf/profiles/76561198102548142#!/compare/1564617600/1564704000

Sold for 12 keys

sale 8:

https://backpack.tf/profiles/76561198346165181#!/compare/1565740800/1565913600

https://backpack.tf/profiles/76561198323565601#!/compare/1565827200/1565913600

QS

Sale 9:

https://backpack.tf/profiles/76561198198071131#!/compare/1566691200/1567641600

https://backpack.tf/profiles/76561198080179568#!/compare/1566604800/1566691200

QS

Sale 10:

https://backpack.tf/profiles/76561198402124564#!/compare/1569110400/1569196800

https://backpack.tf/profiles/76561198267189538#!/compare/1569110400/1569196800

Sold for ~8 keys

Sale 11:

https://backpack.tf/profiles/76561198267189538#!/compare/1569456000/1569542400

https://backpack.tf/profiles/76561198422554075#!/compare/1569542400/1569628800

Sold for 9 keys

Sale 12:

https://backpack.tf/profiles/76561198080179568#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198117971944#!/compare/1563235200/1563408000

Sold for 13 keys

Sale 13:

https://backpack.tf/profiles/76561198117971944#!/compare/1563840000/1563926400

https://backpack.tf/profiles/76561198337734785#!/compare/1563840000/1563926400

QS

Sale 14:

https://backpack.tf/profiles/76561198337734785#!/compare/1564099200/1564185600

https://backpack.tf/profiles/76561198164003933#!/compare/1564099200/1564185600

Sold for 13 keys

Sale 15:

https://backpack.tf/profiles/76561198164003933#!/compare/1564185600/1564358400

https://backpack.tf/profiles/76561198089253101#!/compare/1564099200/1564185600

QS

Sale 16:

https://backpack.tf/profiles/76561198052928590#!/compare/1567123200/1567296000

https://backpack.tf/profiles/76561198267189538#!/compare/1567036800/1567296000

QS

Sale 17:

https://backpack.tf/profiles/76561198267189538#!/compare/1567382400/1567641600

https://backpack.tf/profiles/76561198149081920#!/compare/1567641600/1567728000

Sold for 10 keys

Sale 18:

https://backpack.tf/profiles/76561198149081920#!/compare/1567641600/1567728000

https://backpack.tf/profiles/76561198973894950#!/compare/1567641600/1567728000

https://backpack.tf/profiles/76561198074718149#!/compare/1566864000/1567814400

https://backpack.tf/profiles/76561198973894950#!/compare/1567900800/1567987200

Gambling

Sale 19:

https://backpack.tf/profiles/76561198973894950#!/compare/1567987200/1568073600

https://backpack.tf/profiles/76561198142892266#!/compare/1567987200/1568073600

Untrace

Sale 20:

https://backpack.tf/profiles/76561198142892266#!/compare/1567987200/1568073600

https://backpack.tf/profiles/76561198107298263#!/compare/1565395200/1568073600

Sold for 11 keys

Sale 21- 24:

https://marketplace.tf/items/tf2/181;5;u62

$27 / $1.78 = 15.17 keys

$26 / $1.81 = 14.36 keys <--- https://backpack.tf/item/2152897595

$27 / $1.82 = 14.84 keys

$25.99 / $1.81 = 14.36 keys

Totals sales @:

8, 9, 10, 10, 11, 11, 11, 11.5, 12, 13, 13, 14.36, 14.36, 14.84, 15.17 keys

buyers up to ~7.5 keys,

unsold for 15 keys for months,

unsold for 11 keys for ~2 weeks,

taking 10 - 14 keys.