Sale 1-5:

https://marketplace.tf/items/tf2/30863;5;u10

$49.99 / $1.78 = 28.08 keys // https://backpack.tf/item/6243888735

$59.99 / $1.75 = 34.28 keys

$75 / $1.77 = 42.37 keys

$32 / $1.68 = 19.05 keys

$69.99 / $1.69 = 41.41 keys

Sale 6:

aussie KS scatter(28)

https://backpack.tf/profiles/76561198285638849#!/compare/1579737600/1579824000

https://backpack.tf/profiles/76561198867208675#!/compare/1579478400/1579996800

scatter: https://imgur.com/a/SwAVFrV

Sale 7:

untrace

https://backpack.tf/profiles/76561198285638849#!/compare/1584576000/1584662400

https://backpack.tf/profiles/76561198089253101#!/compare/1584576000/1584662400

Sale 8:

30 Pure

https://backpack.tf/profiles/76561198036104673#!/compare/1580688000/1581724800

https://backpack.tf/profiles/76561198154062277#!/compare/1581638400/1581724800

Sale 9:

bp sell

https://backpack.tf/profiles/76561198100501153#!/compare/1579651200/1581033600

https://backpack.tf/profiles/76561198304302520#!/compare/1579910400/1579996800

Sale 10:

32 pure

https://backpack.tf/profiles/76561198304302520#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198042055185#!/compare/1581984000/1582070400

Sale 11:

bulk

https://backpack.tf/profiles/76561197994697258#!/compare/1578960000/1579219200

https://backpack.tf/profiles/76561198088812563#!/compare/1579132800/1579219200

Sale 12:

untrace

https://backpack.tf/profiles/76561198164721898#!/compare/1581465600/1581552000

https://backpack.tf/profiles/76561198337734785#!/compare/1581465600/1581552000

Sale 13:

untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1581465600/1581552000

https://backpack.tf/profiles/76561198307510760#!/compare/1581465600/1581638400

Sale 14:

untrace

https://backpack.tf/profiles/76561198153088409#!/compare/1583712000/1583798400

https://backpack.tf/profiles/76561198005070905#!/compare/1583712000/1583798400

Sale 15:

bulk

https://backpack.tf/profiles/76561198005070905#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198057452720#!/compare/1584316800/1584403200

Sale 16:

35 pure

https://backpack.tf/profiles/76561198057452720#!/compare/1584489600/1584576000

https://backpack.tf/profiles/76561198067211253#!/compare/1584489600/1584576000

Sale 17:

28 pure

https://backpack.tf/profiles/76561198160856661#!/compare/1579219200/1579305600

https://backpack.tf/profiles/76561198119101701#!/compare/1579046400/1579305600

Sale 18:

untrace

https://backpack.tf/profiles/76561198119101701#!/compare/1581552000/1582070400

https://backpack.tf/profiles/76561198337734785#!/compare/1581724800/1581811200

Sale 19:

untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1581724800/1581811200

https://backpack.tf/profiles/76561198302774496#!/compare/1581638400/1581724800

Sale 20:

untrace

https://backpack.tf/profiles/76561198302774496#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198047828818#!/compare/1581984000/1582156800

Sale 21:

no mini for minigun

unu minigun

https://backpack.tf/profiles/76561198342476957#!/compare/1580256000/1580601600

https://backpack.tf/profiles/76561198295506584#!/compare/1580169600/1580256000

Sale 22:

using there

sold with 5 keys for Ring of Fire Hat to Kill For

https://backpack.tf/profiles/76561198295506584#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198125791160#!/compare/1580256000/1580342400

Sale 23:

untrace

https://backpack.tf/profiles/76561198125791160#!/compare/1580515200/1580601600

https://backpack.tf/profiles/76561198246122716#!/compare/1572652800/1580860800

Sale 24:

bulk

https://backpack.tf/profiles/76561198838788284#!/compare/1582243200/1582588800

https://backpack.tf/profiles/76561198246122716#!/compare/1582502400/1582761600

Sale 25:

32 keys

b/o 34 keys: https://imgur.com/a/l53AzwE

Accursed Requiem(19.5) + Accursed Fubar(12.5)

https://backpack.tf/profiles/76561198838788284#!/compare/1582761600/1583020800

https://backpack.tf/profiles/76561198402240423#!/compare/1582934400/1583020800

Requiem: https://backpack.tf/suggestion/5e938680693103422a7943ac

Fubar : https://backpack.tf/suggestion/5e938e79cf3ac6716e16ef92

Sale 26:

bulk

https://backpack.tf/profiles/76561198059021831#!/compare/1585353600/1585526400

https://backpack.tf/profiles/76561198402240423#!/compare/1585440000/1585526400

Sale 27:

bot transfer

https://backpack.tf/profiles/76561198295486957#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198059021831#!/compare/1586304000/1586390400

Sale 28:

31 pure - sold in less than a day for pure, less than 1 key from buyers therefore quicksell - excluding

https://backpack.tf/profiles/76561198295486957#!/compare/1586563200/1586649600

https://backpack.tf/profiles/76561198084367252#!/compare/1586563200/1586649600

==============================================================================

Sales:

19,28,28,28,30,31,32,32,34,35,41,42

buyers at 30: https://imgur.com/a/oeR0Xah