Credit to Festive Morgan!

Sale 1)

https://gyazo.com/37138e366aa8d9e9c96771800ec45d1b

Item History:

https://next.backpack.tf/item/14740089602

Sold for $80.00

Keys are at $2.27

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

https://gyazo.com/3f2321a7f22adfe90c5f67ca60e74266

80/2.27 = 35.24 Keys = ~ 35 Keys

Sale 2)

Seller:

https://next.backpack.tf/profiles/76561198038666068/compare?from=1723815576&to=1723901976

Buyer:

https://next.backpack.tf/profiles/76561199073805105/compare?from=1723766400&to=1723852800

Item History:

https://next.backpack.tf/item/14980980032

Sold for Overclocked Safe n' Sound and 5 Keys - Better used there.

Sale 3)

Seller:

https://next.backpack.tf/profiles/76561199073805105/compare?from=1724112000&to=1724284800

Buyer:

https://next.backpack.tf/profiles/76561198126838184/compare?from=1724112000&to=1724198400

Item History:

https://next.backpack.tf/item/14980980032

Bulk

Sale 4)

Seller:

https://next.backpack.tf/profiles/76561198126838184/compare?from=1724371200&to=1724457600

Buyer:

https://next.backpack.tf/profiles/76561199191939719/compare?from=1724371200&to=1724457600

Item History:

https://next.backpack.tf/item/14980980032

Untraced

Sale 5)

Seller:

https://next.backpack.tf/profiles/76561199191939719/compare?from=1728086400&to=1728172800

Buyer:

https://next.backpack.tf/profiles/76561198119601623/compare?from=1728086400&to=1728432000

Item History:

https://next.backpack.tf/item/14980980032

39 Keys

Sale 6)

Seller:

https://next.backpack.tf/profiles/76561198065058379/compare?from=1725840000&to=1725926400

Buyer:

https://next.backpack.tf/profiles/76561198191137318/compare?from=1725840000&to=1725926400

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sale 7)

Seller:

https://next.backpack.tf/profiles/76561198191137318/compare?from=1726099200&to=1726185600

Buyer:

https://next.backpack.tf/profiles/76561198324994701/compare?from=1726099200&to=1726185600

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sale 8)

Seller:

https://next.backpack.tf/profiles/76561198324994701/compare?from=1727740800&to=1727827200

Buyer:

https://next.backpack.tf/profiles/76561199485225128/compare?from=1727740800&to=1727827200

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sale 9)

Seller:

https://next.backpack.tf/profiles/76561199485225128/compare?from=1728604800&to=1728691200

Buyer:

https://next.backpack.tf/profiles/76561199207750538/compare?from=1728604800&to=1728691200

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sale 10)

Seller:

https://next.backpack.tf/profiles/76561199207750538/compare?from=1728604800&to=1728691200

Buyer:

https://next.backpack.tf/profiles/76561198161541088/compare?from=1728604800&to=1728691200

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sale 11)

Seller:

https://next.backpack.tf/profiles/76561198161541088/compare?from=1728777600&to=1728864000

Buyer:

https://next.backpack.tf/profiles/76561199191939719/compare?from=1728777600&to=1728864000

Item History:

https://next.backpack.tf/item/15008022025

Untraced

Sales:

35

39

Going with a range of 35 - 39 Keys or an average of 37 Keys

Feedback welcome! Thanks and have a great one! :D