NON-EVENT SUGGESTION

Sale 1:

https://backpack.tf/profiles/76561198059149731#!/compare/1569024000/1569283200

https://backpack.tf/profiles/76561198269395083#!/compare/1569196800/1569283200

Bulk QS

sale 2:

https://backpack.tf/profiles/76561198305494036#!/compare/1569801600/1569888000

https://backpack.tf/profiles/76561198306756308#!/compare/1569715200/1569888000

Sold for 24 keys

sale 3:

https://backpack.tf/profiles/76561198306756308#!/compare/1571788800/1571961600

https://backpack.tf/profiles/76561198014728963#!/compare/1572048000/1572134400

Sold for Aces Pusher

use there

sale 4:

https://backpack.tf/profiles/76561198014728963#!/compare/1573257600/1573344000

https://backpack.tf/profiles/76561198443489337#!/compare/1573257600/1573344000

Untrace

sale 5:

https://backpack.tf/profiles/76561198443489337#!/compare/1573430400/1573516800

https://backpack.tf/profiles/76561198388578474#!/compare/1573430400/1573516800

use there

Sale 6:

https://backpack.tf/profiles/76561198388578474#!/compare/1573516800/1573603200

https://backpack.tf/profiles/76561198867208675#!/compare/1573516800/1573603200

Sold for ~22 keys

Sale 7:

https://backpack.tf/profiles/76561198867208675#!/compare/1574467200/1574553600

https://backpack.tf/profiles/76561198353309101#!/compare/1574467200/1574553600

Untrace

sale 8:

https://backpack.tf/profiles/76561198353309101#!/compare/1574467200/1574553600

https://backpack.tf/profiles/76561198821294885#!/compare/1574467200/1574553600

Sold for 18 keys

Sale 9:

https://backpack.tf/profiles/76561198821294885#!/compare/1574467200/1574553600

https://backpack.tf/profiles/76561198061779536#!/compare/1574467200/1574553600

Sold for 21 keys

Sale 10:

https://backpack.tf/profiles/76561198061779536#!/compare/1574553600/1574726400

https://backpack.tf/profiles/76561198048851745#!/compare/1574467200/1574640000

Sold for ~22 keys

Sale 11:

https://marketplace.tf/items/tf2/199;15;u701;w5;pk307

$44.95 / $1.80 = 24.97 keys

Total sales @:

18, 21, 22, 22, 24, 25 keys

https://backpack.tf/classifieds?page=2&item=Tiger%20Buffed%20%7C%20Shotgun%20%28Battle%20Scarred%29&quality=15&tradable=1&craftable=1&australium=-1&particle=701&killstreak_tier=0

buyers up to ~20 keys,

considering 21 resold for 22 quickly,

taking 22 - 25 keys.