https://marketplace.tf/items/tf2/1093;5;u59

$28.79 / $2.12 = 13.58 keys

https://backpack.tf/profiles/76561198851135021#!/compare/1613520000/1614988800

https://backpack.tf/profiles/76561199089978580#!/compare/1613347200/1613606400

Untraceable

https://backpack.tf/profiles/76561199069084867#!/compare/1614384000/1614470400

https://backpack.tf/profiles/76561198850121720#!/compare/1614297600/1614384000

Untraceable

https://backpack.tf/profiles/76561198850121720#!/compare/1614384000/1614470400

https://backpack.tf/profiles/76561198453530349#!/compare/1614384000/1614470400

Untraceable

https://backpack.tf/profiles/76561198453530349#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561198107748102#!/compare/1614384000/1614556800

9 keys + Strange Part: Allied Healing Done (~2.5 keys at the time) https://backpack.tf/suggestion/602914f14f9d27273a069bb4

Going with 12 keys

https://backpack.tf/profiles/76561198107748102#!/compare/1614902400/1615075200

https://backpack.tf/profiles/76561198267853857#!/compare/1527379200/1614902400

Untraceable

https://backpack.tf/profiles/76561198267853857#!/compare/1614902400/1614988800

https://backpack.tf/profiles/76561198983490591#!/compare/1615075200/1615161600

Untraceable

https://backpack.tf/profiles/76561199012188207#!/compare/1617580800/1620518400

https://backpack.tf/profiles/76561198354979270#!/compare/1617321600/1617580800

8 keys

https://backpack.tf/profiles/76561198354979270#!/compare/1617753600/1617840000

https://backpack.tf/profiles/76561198821589433#!/compare/1617667200/1617753600

9 keys

https://backpack.tf/profiles/76561198821589433#!/compare/1617926400/1618012800

https://backpack.tf/profiles/76561198163549413#!/compare/1617667200/1618099200

9 keys + 26.33 refined = 9.5 keys

https://backpack.tf/profiles/76561198163549413#!/compare/1618099200/1618185600

https://backpack.tf/profiles/76561198197081327#!/compare/1618012800/1618185600

Untraceable

https://backpack.tf/profiles/76561198197081327#!/compare/1618012800/1618185600

https://backpack.tf/profiles/76561198177146103#!/compare/1618099200/1618185600

Bulk for C9 Rebel Rouser

https://backpack.tf/profiles/76561198177146103#!/compare/1618617600/1618704000

https://backpack.tf/profiles/76561198097171432#!/compare/1618617600/1618704000

Untraceable

https://backpack.tf/profiles/76561198157964204#!/compare/1618617600/1618704000

https://backpack.tf/profiles/76561198100484031#!/compare/1613088000/1618704000

Untraceable

https://backpack.tf/profiles/76561198100484031#!/compare/1618704000/1618790400

https://backpack.tf/profiles/76561198040073503#!/compare/1618704000/1618790400

Untraceable

https://backpack.tf/profiles/76561198140558662#!/compare/1617062400/1618358400

https://backpack.tf/profiles/76561199106217370#!/compare/1616976000/1617062400

Untraceable

https://backpack.tf/profiles/76561198037674114#!/compare/1618099200/1618531200

https://backpack.tf/profiles/76561198850121720#!/compare/1618444800/1618531200

Untraceable

https://backpack.tf/profiles/76561199084784906#!/compare/1619395200/1619481600

https://backpack.tf/profiles/76561198164760146#!/compare/1619308800/1619481600

10 keys + 0.33 refined

https://backpack.tf/profiles/76561198164760146#!/compare/1619740800/1620777600

https://backpack.tf/profiles/76561198867595206#!/compare/1620691200/1620777600

Dead Presidents Grenadier's Softcap + 1.5 keys

Classifieds on the Softcap from 9-10 keys https://gyazo.com/0116b0d189286336ba804876eccb77aa

16 key buyout https://gladiator.tf/listings/609aea751812075fbd045b03

This sale is around 11 keys without a mini on the Softcap

https://backpack.tf/profiles/76561198048851745#!/compare/1615420800/1615507200

https://backpack.tf/profiles/76561198115635517#!/compare/1615420800/1615507200

12 keys

Sales:

8

9

9.5

10

~11

12

12

14

https://gyazo.com/f8a9852f6cf02fc8c5a5fdb0cfdeb678

8 days at 16

8 hours at 16

Consistent buyers at ~8.5

Let's go with 9-12, cutting off 14 as a slightly high outlier