Very outdated.

Marketplace.tf sales

https://marketplace.tf/items/tf2/259;5;u32

Oct 3: $18 - $18 / $1.85 = 9.73 keys - rounding to 9.5.

Oct 19: $17.9 - $17.9 / $1.87 = 9.57 keys - rounding to 9.5.

History 1:

https://backpack.tf/item/534980991

Bot transfers.

History 2:

https://backpack.tf/item/765877306

Marketplace.tf sale.

History 3:

https://backpack.tf/item/4097286793

https://backpack.tf/profiles/76561198811261871#!/compare/1604620800/1604966400

https://backpack.tf/profiles/76561198401413774#!/compare/1604620800/1604707200

1:1 for a Stormy Storm Brain Interface. This is a mini for that suggestion.

History 4:

https://backpack.tf/item/4097286793

https://backpack.tf/profiles/76561198841279602#!/compare/1601424000/1601510400

https://backpack.tf/profiles/76561198195933333#!/compare/1601424000/1601510400

Untraceable bot sale?

Conclusion:

Both mptf sales round to 9.5, and we have nothing else. There is a seller at 9 which indicates that anything higher would be too high. Quite odd that there are so little trades for so many instances of this item.