History 1: https://backpack.tf/item/9248412223

Untraceable:

https://backpack.tf/profiles/76561198871959036#!/compare/1611964800/1612051200

https://backpack.tf/profiles/76561199104257864#!/compare/1611360000/1612051200

Sold to a bot:

https://backpack.tf/profiles/76561199104257864#!/compare/1612051200/1612137600

https://backpack.tf/profiles/76561199108134313#!/compare/1612051200/1612137600

It then went to STN.tf and Loot Farm

History 2: https://backpack.tf/item/9176371571

Dumped to Mannco.Trade:

https://backpack.tf/profiles/76561199101442624#!/compare/1610928000/1611100800

https://backpack.tf/profiles/76561198448171943#!/compare/1611014400/1611100800

Bulk:

https://backpack.tf/profiles/76561198448171943#!/compare/1614729600/1614816000

https://backpack.tf/profiles/76561198400462154#!/compare/1614643200/1614988800

It then sold on Mannco.Store

History 3: https://backpack.tf/item/9144311681

Sold on Mannco.Store

Looks like bulk:

https://backpack.tf/profiles/76561198832584507#!/compare/1610323200/1610496000

https://backpack.tf/profiles/76561198871959036#!/compare/1610409600/1610496000

Untraceable:

https://backpack.tf/profiles/76561198871959036#!/compare/1610323200/1610409600

https://backpack.tf/profiles/76561198285887364#!/compare/1610236800/1610323200

Untrace/Bulk:

https://backpack.tf/profiles/76561198285887364#!/compare/1610409600/1610496000

https://backpack.tf/profiles/76561198875715752#!/compare/1610409600/1610496000

Untrace/Bulk:

https://backpack.tf/profiles/76561198875715752#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561198363628327#!/compare/1610496000/1610582400

Untraceable:

https://backpack.tf/profiles/76561198363628327#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561198005504845#!/compare/1604966400/1610496000

Untarceable:

https://backpack.tf/profiles/76561198005504845#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561198131066806#!/compare/1610496000/1610582400

Untraceable:

https://backpack.tf/profiles/76561198131066806#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561198269484722#!/compare/1610496000/1610582400

7 keys 5 ref, ~7 keys:

https://backpack.tf/profiles/76561198269484722#!/compare/1610496000/1610582400

https://backpack.tf/profiles/76561199119221097#!/compare/1610496000/1610582400

Untraceable, nothing matches:

https://backpack.tf/profiles/76561199119221097#!/compare/1610755200/1610841600

https://backpack.tf/profiles/76561198056864822#!/compare/1617062400/1617062400

Mannco.Store sales: https://mannco.store/item/24027

January 10: $16.14/1.85=8.72 ~8.5 keys

March 25: $16.14/1.96=8.23 ~8 keys

Sales at 7, 8 and 8.5

7 is below generic buy orders and sold in less than a day https://gladiator.tf/listings/606a34e202dd4faafea2c81a

Let's go with 8-8.5