Item 1

https://backpack.tf/item/13923490354

Sale 1

https://backpack.tf/profiles/76561198139516603#!/compare/1713830400/1719792000

https://backpack.tf/profiles/76561198057412106#!/compare/1713744000/1713830400

Bulk inv buy

Sale 2

https://backpack.tf/profiles/76561198057412106#!/compare/1714089600/1714262400

https://backpack.tf/profiles/76561198145331385#!/compare/1714176000/1714262400

No clue

Sale 3

https://backpack.tf/profiles/76561198145331385#!/compare/1714262400/1714348800

https://backpack.tf/profiles/76561199651506031#!/compare/1714176000/1714262400

No clue

Gonna skip past tradebacks / likely gambling histories...

Sale 4

https://backpack.tf/profiles/76561199651506031#!/compare/1715040000/1715126400

https://backpack.tf/profiles/76561199176959513#!/compare/1715126400/1715212800

No clue

Sale 5

https://backpack.tf/profiles/76561199176959513#!/compare/1715644800/1715731200

https://backpack.tf/profiles/76561199001022841#!/compare/1715644800/1715731200

No clue

Sale 6

https://backpack.tf/profiles/76561199001022841#!/compare/1715731200/1715817600

https://backpack.tf/profiles/76561198067019877#!/compare/1715212800/1715817600

No clue

Sale 7

https://backpack.tf/profiles/76561198067019877#!/compare/1715817600/1715904000

https://backpack.tf/profiles/76561199564942025#!/compare/1715817600/1715904000

No clue

Sale 8

https://backpack.tf/profiles/76561199564942025#!/compare/1718150400/1718236800

https://backpack.tf/profiles/76561198205545009#!/compare/1718150400/1718236800

129 keys? (14577494406)

Sale 9

https://backpack.tf/profiles/76561198205545009#!/compare/1720224000/1720656000

https://backpack.tf/profiles/76561198163470512#!/compare/1720656000/1720742400

Only 61 keys match, incomplete

Sale 10

https://backpack.tf/profiles/76561198163470512#!/compare/1721347200/1721520000

https://backpack.tf/profiles/76561198273183085#!/compare/1721174400/1721347200

Added for a Burning Flames Cotton Head, using there

Item 2

https://backpack.tf/item/12247749672

Sale 11

https://backpack.tf/profiles/76561198300153840#!/compare/1715817600/1715904000

https://backpack.tf/profiles/76561198163609625#!/compare/1715817600/1715904000

120 keys

Item 3

https://backpack.tf/item/10531239349

Mannco.store sale

Item 4

https://backpack.tf/item/10499000352

Sale 12

https://backpack.tf/profiles/76561198055386288#!/compare/1718150400/1721520000

https://backpack.tf/profiles/76561198349848918#!/compare/1718064000/1718150400

No clue

Sale 13

https://backpack.tf/profiles/76561198349848918#!/compare/1720137600/1720224000

https://backpack.tf/profiles/76561198001602957#!/compare/1653609600/1720224000

Can't say for sure

Total Sales

120, 129

https://imgur.com/a/oM18wvz

I'll just round it off and go with 120 - 130 keys c:

Unsolds:

https://backpack.tf/item/12247749672 - 138

https://backpack.tf/item/7426587083 - 140

https://backpack.tf/item/11943060471 - $324.99