Sale 1:

https://backpack.tf/profiles/76561197963485175#!/compare/1589241600/1589846400

https://backpack.tf/profiles/76561198176375567#!/compare/1590192000/1590278400

Untrace

sale 2:

https://backpack.tf/profiles/76561198176375567#!/compare/1590278400/1593216000

https://backpack.tf/profiles/76561198850274253#!/compare/1590278400/1590537600

QS

sale 3:

https://backpack.tf/profiles/76561198850274253#!/compare/1593820800/1593907200

https://backpack.tf/profiles/76561198049171595#!/compare/1593561600/1594080000

Sold for ~7 keys

sale 4:

https://backpack.tf/profiles/76561198279539667#!/compare/1590192000/1590278400

https://backpack.tf/profiles/76561198337734785#!/compare/1590192000/1590278400

QS

sale 5:

https://backpack.tf/profiles/76561198337734785#!/compare/1591228800/1591315200

https://backpack.tf/profiles/76561198849245519#!/compare/1582243200/1591833600

Keys

sale 6:

https://backpack.tf/profiles/76561198800960555#!/compare/1591920000/1592006400

https://backpack.tf/profiles/76561198057452720#!/compare/1591920000/1592006400

Bulk

sale 7:

https://backpack.tf/profiles/76561198057452720#!/compare/1593129600/1593216000

https://backpack.tf/profiles/76561198235159048#!/compare/1593302400/1593648000

Bulk

sale 8:

https://backpack.tf/profiles/76561198235159048#!/compare/1593302400/1593648000

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

QS

sale 9:

https://backpack.tf/profiles/76561198337734785#!/compare/1593734400/1593820800

https://backpack.tf/profiles/76561198850178158#!/compare/1595721600/1595980800

Untrace

sale 10:

https://backpack.tf/profiles/76561198850178158#!/compare/1596240000/1596326400

https://backpack.tf/profiles/76561198124477567#!/compare/1595548800/1596326400

Sold for 9 keys

sale 11:

https://backpack.tf/profiles/76561198078018027#!/compare/1590364800/1590451200

https://backpack.tf/profiles/76561198325261992#!/compare/1586995200/1590451200

Untrace

sale 12:

https://backpack.tf/profiles/76561198325261992#!/compare/1590451200/1590537600

https://backpack.tf/profiles/76561198077730629#!/compare/1590451200/1590537600

Bulk

sale 13:

https://backpack.tf/profiles/76561198077730629#!/compare/1590710400/1590796800

https://backpack.tf/profiles/76561199057417624#!/compare/1590710400/1590796800

https://backpack.tf/profiles/76561198841279602#!/compare/1590883200/1590969600

Untrace, QS

sale 14:

https://backpack.tf/profiles/76561198841279602#!/compare/1593734400/1593820800

https://backpack.tf/profiles/76561198002757046#!/compare/1594771200/1595462400

Untrace

sale 15:

https://backpack.tf/profiles/76561198922670720#!/compare/1593129600/1596585600

https://backpack.tf/profiles/76561198305494036#!/compare/1593734400/1593907200

QS

sale 16:

https://backpack.tf/profiles/76561198305494036#!/compare/1593993600/1594080000

https://backpack.tf/profiles/76561198141187659#!/compare/1593993600/1594080000

Bulk buy

Sale 17:

https://marketplace.tf/items/tf2/30836;5;u62

$9.11 / $1.89 = 4.82 keys <-- https://backpack.tf/item/7792926038

$19 / $1.90 = 10.00 keys

$18.81 / $1.90 = 9.90 keys <--- https://backpack.tf/item/5406428729

$19.57 / $1.88 = 10.41 keys <--- https://backpack.tf/item/5385613024

$25 / $1.94 = 12.89 keys

$13.99 / $1.99 = 7.03 keys

$19.16 / $1.99 = 9.63 keys

$19.16 / $1.99 = 9.63 keys <--- https://backpack.tf/item/7792926038

$19.16 / $1.97 = 9.73 keys

$18.7 / $1.92 = 9.74 keys

$18.7 / $1.93 = 9.69 keys

$19.5 / $1.92 = 10.16 keys

$19.5 / $1.92 = 10.16 keys

Total sales @:

4.8, 7, 7, 9, 9.5, 9.5, 9.5, 9.5, 9.5, 10, 10, 10, 10, 10, 13 keys

buyers up to ~7.5 keys,

poorly bumped new seller for 11 keys,

month undold for 15 keys,

https://i.imgur.com/NmVP8Ji.png

calling 7 low,

13 high,

taking 9 - 10 keys.