Item 1

https://backpack.tf/item/10743462831

Sale 1

https://backpack.tf/profiles/76561199026390261#!/compare/1738022400/1738108800

https://backpack.tf/profiles/76561198280701608#!/compare/1732924800/1738281600

~7 keys match

Item 2

https://backpack.tf/item/10812137135

Sale 2

https://backpack.tf/profiles/76561198044331457#!/compare/1737936000/1741651200

https://backpack.tf/profiles/76561197963500354#!/compare/1739750400/1740009600

No clue

Item 3

https://backpack.tf/item/10776282045

Sale 3

https://backpack.tf/profiles/76561198047971773#!/compare/1745020800/1745280000

https://backpack.tf/profiles/76561198060189392#!/compare/1745107200/1745193600

I think that's the bot owner?

Item 4

https://backpack.tf/item/10769381154

Sale 4

https://backpack.tf/profiles/76561199420273036#!/compare/1743465600/1743552000

https://backpack.tf/profiles/76561199564942025#!/compare/1743465600/1743552000

Dumped for 4 keys, 30.11 ref = ~4.5 keys?

Sale 5

https://backpack.tf/profiles/76561199564942025#!/compare/1744761600/1744848000

https://backpack.tf/profiles/76561199261160074#!/compare/1744588800/1744761600

No clue

Sale 6

https://backpack.tf/profiles/76561199261160074#!/compare/1745366400/1745452800

https://backpack.tf/profiles/76561198311498888#!/compare/1745366400/1745452800

Re-dumped for an unknown amount

Item 5

https://backpack.tf/item/10745828783

Sale 7

https://backpack.tf/profiles/76561198424878809#!/compare/1736985600/1739404800

https://backpack.tf/profiles/76561198022041768#!/compare/1739318400/1739404800

Bulk buy

Sale 8

https://backpack.tf/profiles/76561198022041768#!/compare/1739318400/1739404800

https://backpack.tf/profiles/76561198141685007#!/compare/1739318400/1739404800

Untrace

Sale 9

https://backpack.tf/profiles/76561198141685007#!/compare/1739318400/1739404800

https://backpack.tf/profiles/76561199564942025#!/compare/1739318400/1739404800

Dumped alongside some other taunts

Mp.tf

https://marketplace.tf/items/tf2/31233;5;u3060

https://backpack.tf/item/10898770141

$16.99 / $1.82 = ~9.5 keys (Feb 13)

$16.99 / $1.82 = ~9.5 keys (Feb 14)

$16.99 / $1.84 = ~9 keys (Mar 6)

$16.99 / $1.91 = ~9 keys (Apr 12)

Total Sales

7, 9, 9, 9.5, 9.5

https://imgur.com/a/BkzJnCh

Mp sales seem pretty consistent

I'll run with 7 - 9.5 keys despite the STN seller @ ~7

Unsolds:

https://backpack.tf/item/10769381154 - ~7

https://backpack.tf/item/10851208061 - $16.99

https://backpack.tf/item/10812137135 - $16.99

SCM - $34.00

SCM - $46.00