Sale 1:

https://backpack.tf/profiles/76561198129651923#!/compare/1564099200/1564185600

https://backpack.tf/profiles/76561198271430706#!/compare/1547856000/1565827200

SCM

Sale 2:

https://backpack.tf/profiles/76561198843728703#!/compare/1566086400/1566518400

https://backpack.tf/profiles/76561198805424403#!/compare/1566172800/1566259200

https://backpack.tf/profiles/76561198377165880#!/compare/1566000000/1566259200

Bulky / low

Sale 3:

https://backpack.tf/profiles/76561198168656595#!/compare/1563753600/1564012800

https://backpack.tf/profiles/76561198027196798#!/compare/1563667200/1563753600

Sold for 11 keys

Sale 4:

https://backpack.tf/profiles/76561198027196798#!/compare/1564185600/1564704000

https://backpack.tf/profiles/76561198405452084#!/compare/1559433600/1564704000

Sold for 15 keys

Sale 5:

https://backpack.tf/profiles/76561198003770322#!/compare/1563148800/1563408000

https://backpack.tf/profiles/76561198063887625#!/compare/1563667200/1564358400

SCM

Sale 6:

https://backpack.tf/profiles/76561198232041512#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198802802073#!/compare/1563321600/1563408000

Sold with 8 keys for TW Soldered

use there

Sale 7:

https://backpack.tf/profiles/76561198802802073#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198866566566#!/compare/1563321600/1563408000

Can trace a key

Sale 8:

https://backpack.tf/profiles/76561198866566566#!/compare/1563321600/1563408000

https://backpack.tf/profiles/76561198102263461#!/compare/1563235200/1563408000

Sold for Aces Crasher + ~2 keys in sweets

Crasher Mini:

https://backpack.tf/suggestion/5d8e68dcd38172551251b3a1

Suggestion for 13 keys

Total is 15 keys

https://bot.tf/stats/listings/MXQ1P796

B/O of 19 keys

Sale 9:

https://backpack.tf/profiles/76561198102263461#!/compare/1563408000/1563494400

https://backpack.tf/profiles/76561197978500506#!/compare/1563408000/1563494400

Bulk

Sale 10:

https://backpack.tf/profiles/76561197978500506#!/compare/1563580800/1563667200

https://backpack.tf/profiles/76561198058977676#!/compare/1563494400/1563667200

Bulk

Sale 11:

https://backpack.tf/profiles/76561198058977676#!/compare/1563753600/1563926400

https://backpack.tf/profiles/76561198042823991#!/compare/1563840000/1563926400

Can trace 11 keys, but bulk..

Sale 12:

https://backpack.tf/profiles/76561198042823991#!/compare/1564444800/1564531200

https://backpack.tf/profiles/76561198447083961#!/compare/1564531200/1565222400

Sold for C9 Reason(15) + 1 key

Total is 16 keys

sale 13:

https://backpack.tf/profiles/76561198447083961#!/compare/1565222400/1566345600

https://backpack.tf/profiles/76561198004952793#!/compare/1566259200/1566345600

Sold for P Fetti Dough + 1 key

Use there, few sales

Sale 14:

https://marketplace.tf/items/tf2/342;5;u56

$29.99 / $1.80 = 16.66 keys

Total sales @:

11, 15, 15, 16, 16.66 keys

calling 11 the outlier,

taking 15 - 17 keys