https://backpack.tf/item/12748157337 - 1 Sale

Sold for 30 Keys:

https://backpack.tf/profiles/76561198125791160#!/compare/1718064000/1718150400 (seller, untrace)

https://backpack.tf/profiles/76561198431380001#!/compare/1718150400/1718496000 (buyer)

---------------------------------------------------

https://backpack.tf/item/13103779218 - Untrace

---------------------------------------------------

https://backpack.tf/item/12002992886 - Untrace into 1 sale

Sold for 26 Keys:

https://backpack.tf/profiles/76561198378941490#!/compare/1718928000/1719014400 (seller, Near ID 14608872811)

https://backpack.tf/profiles/76561198037170179#!/compare/1718928000/1719100800 (buyer, untrace)

---------------------------------------------------

https://backpack.tf/item/12025129051 - 1 Sale

Sold for 25 Keys + Nuts n Bolts Twisted Topper (10.6) = ~36 Keys:

https://backpack.tf/profiles/76561198049080295#!/compare/1723680000/1723766400 (seller, Near ID 14796466831)

https://backpack.tf/profiles/76561198067258554#!/compare/1723680000/1723766400 (buyer, untrace)

Topper:

Sold for $23.7 on the Steam Market on August 25:

https://imgur.com/5j8teji

Keys were around $2.24, making this sale roughly 10.6 Keys:

https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

Although that's around the value of generic buy orders, STN is selling for 11.34, so 10.6 is probably pretty accurate ( https://stntrading.eu/item/tf2/Unusual+Nuts+n%27+Bolts+Twisted+Topper )

Sales at 26, 30, 36 (most recent sale). Taking 26-36.