https://marketplace.tf/items/tf2/139;5;u18

$49.99 / $2.15 = 23.25 keys https://backpack.tf/item/205811961

$49.99 / $2.18 = 22.93 keys

$49.99 / $2.18 = 22.93 keys

$49.99 / $2.09 = 23.92 keys

https://backpack.tf/profiles/76561197994697258#!/compare/1613001600/1613088000

https://backpack.tf/profiles/76561198262594753#!/compare/1613001600/1613088000

Strange Ancient Codex Universal Translator, better used there

https://backpack.tf/profiles/76561198262594753#!/compare/1614211200/1614297600

https://backpack.tf/profiles/76561198122551990#!/compare/1614211200/1614297600

Untraceable

https://backpack.tf/profiles/76561198122551990#!/compare/1614211200/1614297600

https://backpack.tf/profiles/76561198331224889#!/compare/1614297600/1614384000

20 keys + 25 refined

https://backpack.tf/profiles/76561198331224889#!/compare/1614384000/1614470400

https://backpack.tf/profiles/76561198132113904#!/compare/1614384000/1614470400

19 keys

https://backpack.tf/profiles/76561198132113904#!/compare/1614384000/1614470400

https://backpack.tf/profiles/76561198209079857#!/compare/1614384000/1614470400

21 keys + 12.77 refined

https://backpack.tf/profiles/76561198209079857#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561198063140203#!/compare/1614470400/1614643200

Untraceable

https://backpack.tf/profiles/76561198063140203#!/compare/1614988800/1615075200

https://backpack.tf/profiles/76561198873403127#!/compare/1614988800/1615075200

23 keys

https://backpack.tf/profiles/76561198873403127#!/compare/1615334400/1616025600

https://backpack.tf/profiles/76561198453530349#!/compare/1615334400/1615420800

Untraceable

https://backpack.tf/profiles/76561198453530349#!/compare/1616025600/1616112000

https://backpack.tf/profiles/76561199101508611#!/compare/1616025600/1616112000

20 keys + 0.33 refined

https://backpack.tf/profiles/76561199101508611#!/compare/1616025600/1616112000

https://backpack.tf/profiles/76561198850121720#!/compare/1616025600/1616112000

Untraceable

https://backpack.tf/profiles/76561199110809353#!/compare/1616457600/1616544000

https://backpack.tf/profiles/76561199012654860#!/compare/1616371200/1616630400

Untraceable

https://backpack.tf/profiles/76561199012654860#!/compare/1616803200/1616889600

https://backpack.tf/profiles/76561198799601783#!/compare/1616803200/1616889600

Untraceable

https://backpack.tf/profiles/76561198799601783#!/compare/1616803200/1616889600

https://backpack.tf/profiles/76561198198440035#!/compare/1616803200/1616889600

21 keys

https://backpack.tf/profiles/76561198198440035#!/compare/1616889600/1616976000

https://backpack.tf/profiles/76561198357428287#!/compare/1616716800/1616976000

19 keys

https://backpack.tf/profiles/76561198357428287#!/compare/1616976000/1617321600

https://backpack.tf/profiles/76561199066831021#!/compare/1617235200/1617321600

23 keys + 24 refined

https://backpack.tf/profiles/76561199066831021#!/compare/1617580800/1617667200

https://backpack.tf/profiles/76561198282873040#!/compare/1617580800/1617667200

Bulk

Sales:

19

19

20

20.5

21

21

23

23

23

23

23.5

24

Buyers are actually 22.5...?

https://backpack.tf/profiles/76561198282873040#!/compare/1617580800/1617667200

Well, half of the data points are above that and below that.

Going with 23-24 for now.