Hopefully I got that clarification right.

Sale 1:

https://backpack.tf/profiles/76561198119315607#!/compare/1566777600/1567641600

https://backpack.tf/profiles/76561198323565601#!/compare/1566691200/1566777600

QS

Sale 2:

https://backpack.tf/profiles/76561198323565601#!/compare/1566777600/1566864000

https://backpack.tf/profiles/76561198390283377#!/compare/1566777600/1566864000

Sold for 7 keys

Sale 3:

https://backpack.tf/profiles/76561198156908708#!/compare/1561420800/1562630400

https://backpack.tf/profiles/76561198341171690#!/compare/1561334400/1561420800

QS to bot

Sale 4:

https://backpack.tf/profiles/76561198341171690#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198062219350#!/compare/1565740800/1565827200

Sold for ~7.5 keys

sale 5:

https://backpack.tf/profiles/76561198062219350#!/compare/1565740800/1565827200

https://backpack.tf/profiles/76561198366902925#!/compare/1565654400/1565827200

Untrace, maybe keys?

Sale 6:

https://backpack.tf/profiles/76561198366902925#!/compare/1565827200/1565913600

https://backpack.tf/profiles/76561198098111356#!/compare/1565827200/1565913600

Sold for Aces Boron

use there, hat would end up in range.

Sale 7:

https://backpack.tf/profiles/76561198098111356#!/compare/1565827200/1565913600

https://backpack.tf/profiles/76561198021055079#!/compare/1565827200/1565913600

Sold for 10 keys

sale 8:

https://backpack.tf/profiles/76561198021055079#!/compare/1565827200/1565913600

https://backpack.tf/profiles/76561198447297136#!/compare/1565827200/1565913600

Sold for Miami Outdoorsman

Outdoorsman Mini:

https://backpack.tf/suggestion/5d80538fd3817204bb040194

Suggestion for 10.5 keys

Total sales @:

7, 7.5, 10, 10.5 keys

unsold for 9 keys,

buyers up to ~6.5 keys,

Gonna call 7 low,

Taking 7.5 - 10.5 keys, conserving around unsold.

on the rounding, refer here: (hopefully I didn't misunderstand it)