Item 1:

https://backpack.tf/item/7566012094

Sale 1:

https://backpack.tf/profiles/76561198850274253#!/compare/1767657600/1767744000

https://backpack.tf/profiles/76561199026390261#!/compare/1767657600/1767744000

Untrace, sold between a QS bot and STN

Sale 2:

https://backpack.tf/profiles/76561199026390261#!/compare/1771372800/1771459200

https://backpack.tf/profiles/76561198150747376#!/compare/1770768000/1771372800

Untrace, sold by STN

Sale 3:

https://backpack.tf/profiles/76561198150747376#!/compare/1771545600/1772582400

https://backpack.tf/profiles/76561199101376092#!/compare/1771545600/1771632000

Bulk

Item 2:

https://backpack.tf/item/5371522317

Sale 4:

https://marketplace.tf/items/tf2/622;5;u11

Sold for $31.99 on the 25th of Dec and on the 17th of March

Keys were $1.87 on the 25th

Keys were $1.92 on the 17th

25th sale (31.99/1.87) = 17.1 (Rounding to 17 keys)

17th sale (31.99/1.92) = 16.6 (Rounding to 17 keys)

//

Sellers:

BPTF - None

MPTF - https://marketplace.tf/items/tf2/622;5;u11 - None

STN - https://stntrading.eu/item/tf2/Unusual+Circling+TF+Logo+L%27Inspecteur - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20L%27Inspecteur?filter=Circling+TF - None

Sale(s):

17, 17

Going with 17 keys flat