Sale 1:

https://backpack.tf/profiles/76561198850274253#!/compare/1588291200/1588377600

https://backpack.tf/profiles/76561198064171946#!/compare/1573689600/1588377600

Untrace

sale 2:

https://marketplace.tf/items/tf2/174;5;u6

$20 / $1.82 = 10.99 keys

$16 / $1.90 = 8.42 keys

Sale 4:

https://backpack.tf/profiles/76561198182552231#!/compare/1588118400/1590796800

https://backpack.tf/profiles/76561198162120088#!/compare/1590624000/1590710400

Bulk / transfer

Sale 5:

https://backpack.tf/profiles/76561198044541924#!/compare/1589932800/1593129600

https://backpack.tf/profiles/76561198038076640#!/compare/1589241600/1590105600

https://backpack.tf/profiles/76561198272833265#!/compare/1590019200/1590105600

untrace / bulk

sale 6:

https://backpack.tf/profiles/76561198272833265#!/compare/1590105600/1590192000

https://backpack.tf/profiles/76561198841365001#!/compare/1590019200/1590105600

https://backpack.tf/profiles/76561198118157202#!/compare/1590019200/1590105600

Untrace / bulk

sale 7:

https://backpack.tf/profiles/76561198118157202#!/compare/1590105600/1590192000

https://backpack.tf/profiles/76561198078018027#!/compare/1590105600/1590192000

https://backpack.tf/profiles/76561198231709968#!/compare/1590105600/1590192000

Untrace

sale 8:

https://backpack.tf/profiles/76561198231709968#!/compare/1590451200/1590537600

https://backpack.tf/profiles/76561198158554103#!/compare/1590451200/1590537600

Untrace/ bulk

sale 9:

https://backpack.tf/profiles/76561198158554103#!/compare/1590451200/1590537600

https://backpack.tf/profiles/76561198244962432#!/compare/1590451200/1590537600

Sold for 8 keys (keys came from Nebula)

Sale 10:

https://backpack.tf/profiles/76561198244962432#!/compare/1590883200/1590969600

https://backpack.tf/profiles/76561198129811450#!/compare/1590883200/1590969600

Sold for 8 keys

sale 11:

https://backpack.tf/profiles/76561198129811450#!/compare/1590969600/1591142400

https://backpack.tf/profiles/76561198061302796#!/compare/1590883200/1590969600

Sold with ~2 keys for Flies Modest(14)

Total is 12 keys

sale 12:

https://backpack.tf/profiles/76561198061302796#!/compare/1593043200/1593129600

https://backpack.tf/profiles/76561198451665899#!/compare/1592956800/1593043200

Bulk

sale 13:

https://backpack.tf/profiles/76561198451665899#!/compare/1592956800/1593043200

https://backpack.tf/profiles/76561198396034569#!/compare/1592956800/1593043200

Untrace

sale 14:

https://backpack.tf/profiles/76561198396034569#!/compare/1593043200/1593129600

https://backpack.tf/profiles/76561198337734785#!/compare/1593043200/1593129600

QS

sale 15:

https://backpack.tf/profiles/76561198337734785#!/compare/1593561600/1593648000

https://backpack.tf/profiles/76561198865732437#!/compare/1593648000/1593993600

Sold for ~8.5 keys

sale 16:

https://backpack.tf/profiles/76561198865732437#!/compare/1594252800/1594339200

https://backpack.tf/profiles/76561198841279602#!/compare/1594166400/1594252800

QS(?)

sale 17:

https://backpack.tf/profiles/76561198841279602#!/compare/1595289600/1595376000

https://backpack.tf/profiles/76561198337734785#!/compare/1595203200/1595376000

Untrace/ QS

Total sales @:

8, 8, 8.5, 8.5, 11, 12 keys

buyers up to 8 keys,

seller for 10 keys, aging,

https://i.imgur.com/M70GwpV.jpg

taking 8.5 - 11 keys