Sale 1:

https://backpack.tf/profiles/76561198003182237#!/compare/1566864000/1568419200

https://backpack.tf/profiles/76561198254822867#!/compare/1566777600/1566864000

Untrace

Sale 2:

https://backpack.tf/profiles/76561198254822867#!/compare/1566864000/1566950400

https://backpack.tf/profiles/76561198198689581#!/compare/1566864000/1566950400

Bulk

Sale 3:

https://backpack.tf/profiles/76561198198689581#!/compare/1567728000/1567814400

https://backpack.tf/profiles/76561198160856661#!/compare/1567728000/1567814400

Bulk

Sale 4:

https://backpack.tf/profiles/76561198237914408#!/compare/1564099200/1565481600

https://backpack.tf/profiles/76561198094372833#!/compare/1566172800/1566259200

Untrace

Sale 5:

https://backpack.tf/profiles/76561198094372833#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198258438441#!/compare/1566172800/1566259200

Sold with ~1.5 keys in sweets for Blizzardy Sky High(10.5)

Total is 9 keys

Sale 6:

https://backpack.tf/profiles/76561198258438441#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198100836666#!/compare/1566172800/1566259200

Sold with 1 key for Steaming Defiant

Defiant Mini:

https://backpack.tf/suggestion/5d7d583e6780727ee50e870d

Suggestion for 9.75 keys

Total is 8.75 keys

Sale 7:

https://backpack.tf/profiles/76561198100836666#!/compare/1566604800/1566691200

https://backpack.tf/profiles/76561198105071091#!/compare/1566604800/1566691200

Bulk

Sale 8 - 10:

https://marketplace.tf/items/tf2/30030;5;u60

$12 / $1.84 = 6.52 keys

$17.78 / $1.84 = 9.66 keys

$15.1 / $1.80 = 8.39 keys <-- https://backpack.tf/item/7957391404

Total sales @:

6.5, 8.5, 9, 9, 9.5 keys

Buyers up to ~6.5 keys,

calling 6.5 low,

taking 8.5 - 9.5 keys