Sale 1:

https://backpack.tf/profiles/76561198267747792#!/compare/1562025600/1562198400

https://backpack.tf/profiles/76561198055099506#!/compare/1561939200/1562025600

Sold for OF Snaggle

Snaggle Mini:

https://backpack.tf/suggestion/5d8b17d367807210b810dc65

Suggestion for 9.25 keys

Sale 2:

https://backpack.tf/profiles/76561198055099506#!/compare/1562025600/1562198400

https://backpack.tf/profiles/76561198299704044#!/compare/1562112000/1562198400

Sold for OF Shanter(10) + 1 key

Total is 11 keys

Sale 3:

https://backpack.tf/profiles/76561198003926663#!/compare/1562457600/1562544000

https://backpack.tf/profiles/76561198046477272#!/compare/1562371200/1562544000

https://backpack.tf/profiles/76561198337734785#!/compare/1562457600/1562544000

Untrace / QS

Sale 4, 5:

https://marketplace.tf/items/tf2/30316;5;u6

$14.1 / $1.83 = 7.70 keys <-- https://backpack.tf/item/7679405250

$22 / $1.83 = 12.02 keys <-- https://backpack.tf/item/5312746400

Total sales @:

7.5, 9.25, 11, 12 keys

Buyers up to ~7 keys, however just one and not a bot...

multiple sellers down to 11 keys,

gonna call ends outliers,

taking 9.5 - 11 keys