Fixing the range per Foamy's suggestion.

https://backpack.tf/item/1120077299

Sale 1) Sold for 55 Keys

https://backpack.tf/profiles/76561198122604075#!/compare/1546646400/1546732800

Sale 2) ?

https://backpack.tf/profiles/76561198126546221#!/compare/1546905600/1546992000

https://backpack.tf/profiles/76561198305494036#!/compare/1546905600/1546992000

Sale 3) Sold for 54 Keys

https://backpack.tf/profiles/76561198305494036#!/compare/1547596800/1547683200

Sale 4) ?

https://backpack.tf/profiles/76561198058908965#!/compare/1549929600/1550102400

https://backpack.tf/profiles/76561198119634686#!/compare/1550016000/1550102400

Sale 5) Sold for 48 Keys?

https://backpack.tf/profiles/76561198119634686#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198234128068#!/compare/1550448000/1550534400

Sale 6) Sold for $111.11 when Keys were ~$1.80 each

https://marketplace.tf/items/54;5;u30

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

111.11 / 1.80 = 61.72, which rounds to 62 Keys

https://backpack.tf/item/641435980

Sale 7) Bulk sale

https://backpack.tf/profiles/76561198007624981#!/compare/1552089600/1553212800

https://backpack.tf/profiles/76561198088984882#!/compare/1553126400/1553212800

Sale 8) Bulk sale

https://backpack.tf/profiles/76561198088984882#!/compare/1553212800/1553299200

https://backpack.tf/profiles/76561198232041512#!/compare/1553040000/1553299200

Sale 9) Quicksold for 55 Keys

https://backpack.tf/profiles/76561198232041512#!/compare/1553040000/1553299200

https://backpack.tf/item/728228460

Sale 10) Sold for 48 Keys

https://backpack.tf/profiles/76561198107219183#!/compare/1546646400/1546732800

Low outlier.

Sale 11) Sold + 1 Key + ~0.5 Keys of Items for a Duped Harvest Moon Shooter's Sola Topi

https://backpack.tf/profiles/76561198310972287#!/compare/1546646400/1546732800

https://backpack.tf/profiles/76561198053717045#!/compare/1546646400/1546732800

Using this for the Topi.

Sale 12) ?

https://backpack.tf/profiles/76561198053717045#!/compare/1546732800/1546819200

https://backpack.tf/profiles/76561198059725326#!/compare/1546473600/1546819200

Sale 13) Bulk sale

https://backpack.tf/profiles/76561198059725326#!/compare/1546905600/1546992000

Sale 14) Sold for 50 Keys

https://backpack.tf/profiles/76561198125791160#!/compare/1549670400/1549756800

Sale 15) Sold for an Eerie Orbiting Fire Charmer's Chapeau + Green Confetti Burning Beanie + 10 Keys

https://backpack.tf/profiles/76561198286257338#!/compare/1555459200/1555545600

https://imgur.com/a/9tQ6juz - Capped by the Buyout of 60 Keys

Sale 16) Bulk sale

https://backpack.tf/profiles/76561198327837250#!/compare/1556064000/1556150400

https://backpack.tf/profiles/76561198008994962#!/compare/1556064000/1556150400

Sale 17) Bulk sale

https://backpack.tf/profiles/76561198008994962#!/compare/1556064000/1556150400

https://backpack.tf/profiles/76561198090147535#!/compare/1555977600/1556150400

https://backpack.tf/item/1297770199

Sale 18) Sold for 46 Keys + 5 Refined

https://backpack.tf/profiles/76561198128999327#!/compare/1548720000/1549929600

https://backpack.tf/profiles/76561198832602199#!/compare/1548633600/1548720000

Low outlier.

Sale 19) Sold + 9 Keys for a Circling Peace Sign War Pig + Duped Sulphurous Ol' Guadalajara

https://backpack.tf/profiles/76561198832602199#!/compare/1552003200/1552089600

https://backpack.tf/profiles/76561198062225011#!/compare/1552003200/1552089600

https://imgur.com/a/KqOJIf2 - Capped by the Buyout of 56 Keys

https://marketplace.tf/items/54;5;u30 - Sold for $111.11 on March 3rd when Keys were ~$1.79 each

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

111.11 / 1.79 = 62.07, which rounds to 62 Keys

https://imgur.com/a/L9DhS9D - Calling 48 and 50 low because of this Buyer at 49 and Buyer at 50

https://backpack.tf/u/76561198061275415

https://backpack.tf/u/76561198139831684

https://imgur.com/a/hBmXVPp - Calling 60 and 62 high because of these lengthy Unsolds at 60 Keys

https://backpack.tf/item/728228460

https://backpack.tf/item/668243324