Sale 1:

https://backpack.tf/profiles/76561198396959351#!/compare/1581120000/1581206400

https://backpack.tf/profiles/76561198040454757#!/compare/1581120000/1581206400

Sold for 12 keys

sale 2:

https://backpack.tf/profiles/76561198040454757#!/compare/1581206400/1581292800

https://backpack.tf/profiles/76561198158242140#!/compare/1581206400/1581292800

sold for 9 keys

sale 3:

https://backpack.tf/profiles/76561198158242140#!/compare/1581292800/1581379200

https://backpack.tf/profiles/76561198087806226#!/compare/1581292800/1581379200

Bulky

Sale 4:

https://backpack.tf/profiles/76561198087806226#!/compare/1581552000/1581638400

https://backpack.tf/profiles/76561198978621382#!/compare/1581379200/1581724800

Sold for DBD Crasher

Crasher Mini:

https://backpack.tf/suggestion/5eaa50ccd6bedc3c536f52bb

Suggestion for 14 keys

sale 5:

https://backpack.tf/profiles/76561198978621382#!/compare/1581984000/1582070400

https://backpack.tf/profiles/76561198080355107#!/compare/1581897600/1581984000

Sold for Showstopper RPS + MS BaL

RPS Mini:

https://backpack.tf/suggestion/5eaa5c9716f5786adf2231c1

Suggestion for 7 keys

BaL Mini:

https://backpack.tf/suggestion/5eaa69673adb653e8a3b315a

Suggestion for ~3.3 keys

Total is ~10.3 keys

sale 6:

https://marketplace.tf/items/tf2/753;5;u33

$28 / $1.78 = 15.73 keys

Total sales @:

9, 10, 12, 14, 16 keys

buyers up to ~8.81 keys,

calling 9 low,

16 high to balance,

taking 10 - 14 keys.