Resuggestion, thanks to FishCrimes for the info!

Sale 1:

https://backpack.tf/profiles/76561198135932729#!/compare/1567555200/1569888000

https://backpack.tf/profiles/76561198306308229#!/compare/1567468800/1567641600

Sold with ~0.5 keys in sweets for 10 keys

Total is ~9.5 keys

Sale 2:

https://backpack.tf/profiles/76561198306308229#!/compare/1568592000/1568764800

https://backpack.tf/profiles/76561198201385195#!/compare/1568678400/1568764800

Sold for ~9.5 keys

Sale 3:

https://backpack.tf/profiles/76561198201385195#!/compare/1568764800/1568851200

https://backpack.tf/profiles/76561198100564024#!/compare/1568678400/1568764800

Sold with 8 keys for C9 Front Runner

bulky / use there

Sale 4:

https://backpack.tf/profiles/76561198100564024#!/compare/1569196800/1569542400

https://backpack.tf/profiles/76561198371427642#!/compare/1569456000/1569542400

Untrace

Sale 5:

https://backpack.tf/profiles/76561198371427642#!/compare/1569456000/1569542400

https://backpack.tf/profiles/76561198374206487#!/compare/1569369600/1569542400

Sold for 9 keys

sale 6:

https://backpack.tf/profiles/76561198425213986#!/compare/1561766400/1562112000

https://backpack.tf/profiles/76561198087763379#!/compare/1562025600/1562112000

Sold for 11 keys

Sale 7:

https://backpack.tf/profiles/76561198087763379#!/compare/1562112000/1562198400

https://backpack.tf/profiles/76561198280638746#!/compare/1561507200/1562198400

Untrace

sale 8:

https://backpack.tf/profiles/76561198280638746#!/compare/1561507200/1562198400

https://backpack.tf/profiles/76561198171199266#!/compare/1562112000/1562198400

Sold with negligible sweets for 9 keys

Sale 9:

https://backpack.tf/profiles/76561198171199266#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198096507227#!/compare/1562198400/1562284800

Sold for Steaming Stout + ~1 key in sweets

use there, hit hard by Crate Depression

Sale 10:

https://backpack.tf/profiles/76561198096507227#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198100836666#!/compare/1562198400/1562284800

Sold for 9 keys

sale 11:

https://backpack.tf/profiles/76561198100836666#!/compare/1562284800/1562371200

https://backpack.tf/profiles/76561198151035703#!/compare/1562284800/1562371200

Untrace

Sale 12:

https://backpack.tf/profiles/76561198151035703#!/compare/1562716800/1563321600

https://backpack.tf/profiles/76561198312583107#!/compare/1563235200/1563321600

Sold for KaW Airdog

use there

sale 13:

https://backpack.tf/profiles/76561198872463968#!/compare/1567555200/1569542400

https://backpack.tf/profiles/76561198055088168#!/compare/1569628800/1569715200

Untrace

Sale 14:

https://marketplace.tf/items/tf2/30069;5;u36

$17.95 / $1.82 = 9.86 keys <-- https://backpack.tf/item/5502010656

Total sales @:

9, 9, 9, 9.5, 9.5, 9.86, 11 keys

seller for 9 keys poorly bumped,

Fish's Part:

Seems like 11 is kind of a stretch here; that sale is one day from being outdated. The stout and airdog kinda support the high end, but our high end sale is the only one that is that high and that old. What about 9-10?