Sale #1:

https://backpack.tf/profiles/76561198018148078#!/compare/1550102400/1550188800

Sold with 1 key and 3 Festivizers (.9 keys) for a Max's Severed Head (21.5 keys)

21.5 - 2.7 - 1 = ~18 keys

18 keys

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Sale #2:

https://backpack.tf/profiles/76561198197215790#!/compare/1550102400/1550188800

Bulk.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Sale #3:

https://backpack.tf/profiles/76561198291712570#!/compare/1547856000/1547942400

Sold for a Non-Craftable Professional Killstreak Scattergun Kit (17 keys) and 5 keys.

22 keys

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Sale #4:

https://backpack.tf/profiles/76561198123163113#!/compare/1544572800/1544745600

Bulk.

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Minis:

Non-Craftable Professional Killstreak Scattergun Kit:

https://steamcommunity.com/market/listings/440/Professional%20Killstreak%20Scattergun%20Kit

Past 30 days:

1x $40.50

1x $53.98

1x $40.52

1x $33.50

1x $38.84

1x $38.62

1x $40.39

1x $33.55

1x $48.05

1x $38.11

1x $58.87

1x $33.15

1x $35.56

1x $36.24

1x $35.65

1x $45.10

1x $37.08

1x $37.97

1x $32.07

2x $45.48

1x $53.40

1x $28.41

1x $37.99

1x $32.40

1x $32.46

1x $42.01

1x $38.35

1x $66.13

1x $38.00

1x $38.47

1x $38.46

1x $50.17

1x $33.38

1x $48.88

1x $34.06

Total = $1461.28

Average = $40.59

$40.59 / $2.32 = ~17.49

17 keys