Now then.

Sale 1: Sold for 40 keys

https://backpack.tf/profiles/76561198178373491#!/compare/1589846400/1590105600

https://backpack.tf/profiles/76561198119634686#!/compare/1589500800/1589846400

Sale 2: Sold for 50 keys

https://backpack.tf/profiles/76561198125791160#!/compare/1589068800/1589155200

https://backpack.tf/profiles/76561198969000858#!/compare/1589068800/1589155200

Sale 3: Sold for Steaming Crone's Dome

https://backpack.tf/profiles/76561198304077564#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198125791160#!/compare/1586649600/1586736000

Using over there, as there are fewer sales.

Sale 4: Sold for 48 keys

https://backpack.tf/profiles/76561198358337981#!/compare/1586476800/1586563200

https://backpack.tf/profiles/76561198304077564#!/compare/1586476800/1586563200

Sale 5 & 6: Marketplace

https://marketplace.tf/items/tf2/920;5;u33

https://backpack.tf/item/2434103779 (Sale 5)

109.95 on April 6, 2020 (109.95/1.69 = 65.05 rounding to 65 keys)

Buyout was 50 keys

https://bot.tf/stats/listings/YD111Q55

95 on April 12, 2020 (95/1.71 = 55.55 rounding to 56 keys)

Sale 7: Unknown

https://backpack.tf/profiles/76561198258937500#!/compare/1586476800/1586563200

https://backpack.tf/profiles/76561198371231026#!/compare/1530144000/1589155200

Sale 8: Bulk for Bonzo The All-Gnawing Pirate Bandana

https://backpack.tf/profiles/76561198007624981#!/compare/1586131200/1586390400

https://backpack.tf/profiles/76561198258937500#!/compare/1586304000/1586390400

Classifieds:

https://gyazo.com/a13099ec35884dc681e6dc4d2e7dcec0

Two sellers at 52 and 54. One of the sellers has been changing their listed price from 47 to 50 to 54, over the course of 3 months.

https://bot.tf/stats/listings/4PPEE36E

https://bot.tf/stats/listings/4EPERD12

https://bot.tf/stats/listings/MGL7OXVZ

Sales are at 40, 48, 50, 50, and 56. Multiple buyers at 40. Multiple sellers at 52 and 54, one being there for longer than 2 months. Excluding 40 and 56. Although there is 1 buyer at 52 keys, the buyer is incredibly new, and 3 sales at close proximity exceeds 1 buyer.

Taking a range of 48-50 keys here.