Sale 1:

https://backpack.tf/profiles/76561198137408503#!/compare/1583712000/1583798400

https://backpack.tf/profiles/76561198295486957#!/compare/1583712000/1583798400

Sold for ~8.5 keys

sale 2:

https://backpack.tf/profiles/76561198059021831#!/compare/1583884800/1583971200

https://backpack.tf/profiles/76561198796671544#!/compare/1584057600/1584662400

Untrace

sale 3:

https://backpack.tf/profiles/76561198796671544#!/compare/1584748800/1585094400

https://backpack.tf/profiles/76561198986098845#!/compare/1585008000/1585094400

Sold for ~7.5 keys

Sale 4:

https://backpack.tf/profiles/76561198986098845#!/compare/1586304000/1586390400

https://backpack.tf/profiles/76561198055224435#!/compare/1586304000/1586390400

Bulk

sale 5:

https://backpack.tf/profiles/76561198055224435#!/compare/1589068800/1589500800

https://backpack.tf/profiles/76561198985910282#!/compare/1589241600/1589328000

Sold for 8 keys (QS)

Sale 6:

https://backpack.tf/profiles/76561198985910282#!/compare/1589241600/1589328000

https://backpack.tf/profiles/76561198118334319#!/compare/1589328000/1589414400

sold for keys (Baker sold for keys, then those keys resold for the hat)

sale 7:

https://backpack.tf/profiles/76561199010569967#!/compare/1585785600/1589241600

https://backpack.tf/profiles/76561198026129220#!/compare/1587859200/1587945600

QS

sale 8:

https://backpack.tf/profiles/76561198026129220#!/compare/1588291200/1588377600

https://backpack.tf/profiles/76561198105640223#!/compare/1587772800/1588550400

Untrace

sale 9:

https://backpack.tf/profiles/76561198106189896#!/compare/1583625600/1583971200

https://backpack.tf/profiles/76561198119706500#!/compare/1551312000/1584057600

SCM

sale 10:

https://backpack.tf/profiles/76561198119706500#!/compare/1584057600/1585094400

https://backpack.tf/profiles/76561198280357850#!/compare/1585008000/1585094400

Bulk for keys

sale 11:

https://backpack.tf/profiles/76561198280357850#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198048851745#!/compare/1585094400/1585180800

QS

sale 12:

https://backpack.tf/profiles/76561198145496150#!/compare/1587513600/1587600000

https://backpack.tf/profiles/76561198095022965#!/compare/1587513600/1587600000

Bulk

Sale 13:

https://marketplace.tf/items/tf2/31101;5;u35

$16.67 / $1.67 = 9.98 keys

$11 / $1.82 = 6.04 keys

$15 / $1.88 = 7.98 keys

$14 / $1.88 = 7.45 keys

Total sales @:

6, 7.5, 7.5, 8, 8, 8.5, 10 keys

buyers up to ~6.5 keys,

3 sellers for ~8 keys, unsold for ~3 weeks,

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

taking 7.5 - 8.5 keys.