Item 1

https://backpack.tf/item/10858407618

Nothing here

Item 2

https://backpack.tf/item/10747511309

Sale 1

https://backpack.tf/profiles/76561198371959919#!/compare/1654300800/1688860800

https://backpack.tf/profiles/76561198982972591#!/compare/1690675200/1690761600

Can't find buyer compares

Sale 2

https://backpack.tf/profiles/76561198982972591#!/compare/1690675200/1690761600

https://backpack.tf/profiles/76561198862682995#!/compare/1690588800/1690675200

Untrace on seller side

Item 3

https://backpack.tf/item/9567937455

Covering mp.tf at the end

Item 4

https://backpack.tf/item/8337757305

This is likely the May sale? - I'll make a note to exclude that but I think it's too high regardless

Sale 3

https://backpack.tf/profiles/76561198453530349#!/compare/1687046400/1687132800

https://backpack.tf/profiles/76561199099521803#!/compare/1687046400/1687132800

Untrace on seller side

Item 5

https://backpack.tf/item/7496427450

Sale 4

https://backpack.tf/profiles/76561198097171432#!/compare/1684368000/1684540800

https://backpack.tf/profiles/76561199446578917#!/compare/1684281600/1684368000

Gambling?

Sale 5

https://backpack.tf/profiles/76561199446578917#!/compare/1684368000/1684627200

https://backpack.tf/profiles/76561198983856237#!/compare/1684540800/1684972800

Gambling?

Sale 6

https://backpack.tf/profiles/76561198983856237#!/compare/1684972800/1685318400

https://backpack.tf/profiles/76561198426067035#!/compare/1684972800/1685145600

Gambling?

Sale 7

https://backpack.tf/profiles/76561198426067035#!/compare/1685145600/1685232000

https://backpack.tf/profiles/76561199192607141#!/compare/1685059200/1685145600

No clue

Everything else in this history is just bot transfers

Item 6

https://backpack.tf/item/7419848039

Nothing here I can use

Item 7

https://backpack.tf/item/7255715304

Sale 8

https://backpack.tf/profiles/76561198012410589#!/compare/1683244800/1683590400

https://backpack.tf/profiles/76561199197624825#!/compare/1683417600/1683504000

Can only match ref

Sale 9

Bot transfers

Mp.tf

https://marketplace.tf/items/tf2/1197;5;u3060

$12.99 / $2.03 = ~6.5 keys (May 8) - This was probably the one dumped to scrap in item 4?

$9.99 / $1.99 = ~5 keys (Jun 2)

$9.99 / $2.00 = ~5 keys (Jun 18)

$9.99 / $2.00 = ~5 keys (Jun 20)

$7.99 / $1.95 = ~4.10 keys (Jul 25)

$7.99 / $1.95 = ~4.10 keys (Jul 26)

2 @ $7.99 / $1.95 = ~4.10 keys (Jul 29)

Total Sales

4.1, 4.1, 4.1, 4.1, 5, 5, 5, 6.5

https://imgur.com/a/23RCVzu

Mp.tf sells lower than those 5 key sales

Slightly lower seller @4

Ranging off that and taking 4 - 4.1 keys c: