Marketplace.tf sales:

https://marketplace.tf/items/tf2/255;5;u31

Sale #1: $9.00 / $2.01 (https://manic.tf/keyprice/?at=2020-06-29) = 4.48 ~ 4.5 keys

Sale #2: $13.99 / $2.01 (https://manic.tf/keyprice/?at=2020-07-02) = 6.96 ~ 7 keys

Sale #3: $14.00 / $1.80 (https://manic.tf/keyprice/?at=2020-08-14) = 7.78 ~ 8 keys

All unknown item history and unknown B/O.

No sales on Mannco.store: https://mannco.store/item/4701

Item tracing:

Item 1: https://backpack.tf/item/6413248785

Sale #4

bought from Scrap.TF, and untraced

https://backpack.tf/profiles/76561198135388328#!/compare/1598745600/1598832000

https://backpack.tf/profiles/76561198337734785#!/compare/1598745600/1598832000

Item 2: https://backpack.tf/item/1502406386

Sale #5

untraced

https://backpack.tf/profiles/76561198013011182#!/compare/1594598400/1596067200

https://backpack.tf/profiles/76561198237084522#!/compare/1596758400/1599350400

Item 3: https://backpack.tf/item/1027946626 (duped)

Sale #6

untraced/missing

https://backpack.tf/profiles/76561198074043822#!/compare/1594598400/1594771200

https://backpack.tf/profiles/76561198030058573#!/compare/1594512000/1594684800

Sale #7

missing/untraced

https://backpack.tf/profiles/76561198030058573#!/compare/1594512000/1594598400

https://backpack.tf/profiles/76561198337734785#!/compare/1594512000/1594598400

Item 4: https://backpack.tf/item/849164627 (duped)

Sale #8

untraced/missing

https://backpack.tf/profiles/76561198042850006#!/compare/1594425600/1599436800

https://backpack.tf/profiles/76561198056960290#!/compare/1592870400/1596326400

----------------------------------------

Current listings: https://gyazo.com/113d2265b26869defef5b78a5e5cde89

Selling for lowest 6.51 keys

Buying at highest 6 keys

----------------------------------------

Valid sales: 4.5, 7, 8

Excluding 4, clearly a QS and way below buy orders

Excluding 8 keys, since there's one seller selling for 7 keys that's unsold for 1 week.

Taking 7 keys flat.