Hot Take

https://backpack.tf/item/4889656420

Sale 1) Sold for $92.96

https://marketplace.tf/items/30786;5;u10

Low outlier.

Sale 2) Sold for a Cloud 9 Gauzed Gaze (38.5 Keys) + Purple Energy Baron (37 Keys) + Screaming Tiger Panzer Pants (22 Keys) + Searing Mirror (16.5 Keys)

https://backpack.tf/profiles/76561198041108750#!/compare/1547251200/1547337600

https://imgur.com/a/HE8EUfj - Capped by the Buyout of 100 Keys

Baron Mini

https://backpack.tf/suggestion/5c44eeef44325a1d2924a360 - 37 Keys

Mirror Mini

https://marketplace.tf/items/104;5;u15 - Seller at $29. Keys are $1.75, so this listing is 16.57 Keys, which I'll round to 16.5 Keys.

https://marketplace.tf/items/5021;6/Mann%20Co.%20Supply%20Crate%20Key

https://imgur.com/a/tZvKZ6q - In case the price changes

https://imgur.com/a/8iMx6qk - Mirror listing