https://marketplace.tf/items/tf2/30118;5;u58

$38 / $1.84 = 20.65 keys

$35.95 / $1.83 = 19.64 keys

$35.95 / $1.83 = 19.64 keys

$33 / $1.86 = 17.74 keys = Exclude

$65 / $1.89 = 34.39 keys = Exclude

https://backpack.tf/profiles/76561198059098316#!/compare/1601164800/1601251200

https://backpack.tf/profiles/76561198075875098#!/compare/1600387200/1601337600

Unknown

https://backpack.tf/profiles/76561198363395191#!/compare/1601337600/1601510400

https://backpack.tf/profiles/76561198075875098#!/compare/1601337600/1601510400

Unknown

https://backpack.tf/profiles/76561198091902233#!/compare/1600473600/1604448000

https://backpack.tf/profiles/76561198363395191#!/compare/1601424000/1601510400

Unknown

https://backpack.tf/profiles/76561198850178158#!/compare/1597536000/1597622400

https://backpack.tf/profiles/76561198249548030#!/compare/1597536000/1597622400

Unknown

https://backpack.tf/profiles/76561198249548030#!/compare/1598140800/1598313600

https://backpack.tf/profiles/76561198377165880#!/compare/1598140800/1598227200

Dumped

https://backpack.tf/profiles/76561198377165880#!/compare/1600560000/1600646400

https://backpack.tf/profiles/76561198072565665#!/compare/1600560000/1600646400

21

https://backpack.tf/profiles/76561198052246700#!/compare/1601424000/1601510400

https://backpack.tf/profiles/76561198851597200#!/compare/1601337600/1601424000

Your guess is as good as much = excluding

https://backpack.tf/profiles/76561198851597200#!/compare/1601424000/1601510400

https://backpack.tf/profiles/76561198161067554#!/compare/1601251200/1601510400

Unknown

https://backpack.tf/profiles/76561197972404012#!/compare/1601942400/1602028800

https://backpack.tf/profiles/76561198161067554#!/compare/1601856000/1602028800

17 keys = Exclude

https://backpack.tf/profiles/76561197972404012#!/compare/1602028800/1602115200

https://backpack.tf/profiles/76561198113402108#!/compare/1602028800/1602374400

20 keys

https://backpack.tf/profiles/76561197972404012#!/compare/1597622400/1598140800

https://backpack.tf/profiles/76561198088707185#!/compare/1597795200/1598140800

Qsed

https://backpack.tf/profiles/76561198088707185#!/compare/1598486400/1598572800

https://backpack.tf/profiles/76561198082177132#!/compare/1596585600/1601856000

Unknown

https://backpack.tf/profiles/76561198082177132#!/compare/1603497600/1603584000

https://backpack.tf/profiles/76561198375673085#!/compare/1603497600/1603584000

Unknown

https://backpack.tf/profiles/76561198375673085#!/compare/1603843200/1603929600

https://backpack.tf/profiles/76561198826254247#!/compare/1603843200/1603929600

Unknown

https://backpack.tf/profiles/76561198826254247#!/compare/1603929600/1604016000

https://backpack.tf/profiles/76561198065206206#!/compare/1603929600/1604016000

23

https://backpack.tf/profiles/76561198065206206#!/compare/1604534400/1604620800

https://backpack.tf/profiles/76561198053907503#!/compare/1604620800/1604707200

19 = Exclude

https://backpack.tf/profiles/76561198171707301#!/compare/1600041600/1600214400

https://backpack.tf/profiles/76561198011321852#!/compare/1600041600/1600214400

Bulk

https://backpack.tf/profiles/76561198011321852#!/compare/1604188800/1604275200

https://backpack.tf/profiles/76561198150917840#!/compare/1604275200/1604361600

23

https://backpack.tf/profiles/76561198146408824#!/compare/1601078400/1601251200

https://backpack.tf/profiles/76561198106511423#!/compare/1601078400/1601251200

Bulk

https://backpack.tf/profiles/76561198103203151#!/compare/1600646400/1601078400

https://backpack.tf/profiles/76561198850274253#!/compare/1600992000/1601078400

Dumped

https://backpack.tf/profiles/76561199084784906#!/compare/1601856000/1601942400

https://backpack.tf/profiles/76561197962717784#!/compare/1602115200/1602201600

No clue

https://backpack.tf/profiles/76561197962717784#!/compare/1602547200/1602633600

https://backpack.tf/profiles/76561198059098316#!/compare/1602547200/1602633600

22

https://backpack.tf/profiles/76561198048724906#!/compare/1605052800/1605139200

https://backpack.tf/profiles/76561198070308138#!/compare/1605139200/1605225600

Using there

17, 18, (Bo: 18.46 ) | 19, 20, 20, 20, 21, 21, 22, 23, 23, 34

Excluding 19 as buyorders trends upward toward round up and 34 as it is high considering sales

20-23