The Sale:

Sold from scrap.tf for 9 keys + Negligible metal

https://backpack.tf/profiles/76561198135388328#!/compare/1704499200/1704585600

https://backpack.tf/profiles/76561198171207933#!/compare/1704499200/1704585600

https://backpack.tf/item/11660603951

= 9 keys

Other Sales:

#1

https://backpack.tf/profiles/76561197991460771#!/compare/1703980800/1705276800

https://backpack.tf/profiles/76561198135388328#!/compare/1704499200/1704585600

https://backpack.tf/item/11660603951

Untraceable

#2

https://backpack.tf/profiles/76561199523405376#!/compare/1697673600/1697760000

https://backpack.tf/profiles/76561199101376092#!/compare/1697760000/1697846400

https://backpack.tf/item/13085597726

Untraceable, probably gambled or something.

#3

https://backpack.tf/profiles/76561199084784906#!/compare/1697932800/1698019200

https://backpack.tf/profiles/76561199482312336#!/compare/1697846400/1698105600

https://backpack.tf/item/12446228685

Untraceable

#4

https://backpack.tf/profiles/76561198880428283#!/compare/1699920000/1700006400

https://backpack.tf/profiles/76561198398638928#!/compare/1699920000/1700006400

https://backpack.tf/item/12957352946

Untraceable, appears to have been a bulky sale.

#5

https://backpack.tf/profiles/76561198307149320#!/compare/1700352000/1700438400

https://backpack.tf/profiles/76561198316831771#!/compare/1700352000/1700438400

https://backpack.tf/item/12957352946

Untraceable

#6

https://backpack.tf/profiles/76561198066423064#!/compare/1704585600/1706227200

https://backpack.tf/profiles/76561198060299122#!/compare/1705536000/1705622400

https://backpack.tf/item/12086973703

Backpack buy

#7

https://backpack.tf/profiles/76561198116189166#!/compare/1707004800/1707177600

https://backpack.tf/profiles/76561199375927223#!/compare/1707004800/1707177600

https://backpack.tf/item/12373434922

Bulk/alt transfer

#8

https://backpack.tf/profiles/76561199375927223#!/compare/1707177600/1707264000

https://backpack.tf/profiles/76561198311498888#!/compare/1707177600/1707264000

https://backpack.tf/item/12373434922

Bulk for keys

https://imgur.com/a/3cPvzqh - stn buying for ~6.5 keys.

https://backpack.tf/item/12842829220 - mannco

https://backpack.tf/item/13997549751 - unusualified

Sellers:

https://imgur.com/a/kgtv9Nu

https://backpack.tf/item/12435885736 - 12 keys

https://backpack.tf/item/11967728850 - 12 keys

Sale at 9 keys, supported by a possible bot dump at ~6.5 keys.

Taking 9 flat.

Forgot to include:

https://stntrading.eu/item/tf2/Unusual+Holy+Grail+Taunt%3A+The+Hot+Wheeler

https://imgur.com/a/bH4rDHd

Being sold for ~10 keys on STN