Sale 1:

https://backpack.tf/profiles/76561198802991149#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198268575795#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198191779491#!/compare/1583452800/1583625600

https://backpack.tf/profiles/76561198196410274#!/compare/1583539200/1583625600

Untrace

Sale 2:

https://backpack.tf/profiles/76561198196410274#!/compare/1583539200/1583625600

https://backpack.tf/profiles/76561198354125451#!/compare/1583539200/1583625600

Sold for G Fetti Festivizer

use there

Sale 3:

https://backpack.tf/profiles/76561198354125451#!/compare/1583625600/1583971200

https://backpack.tf/profiles/76561198152017357#!/compare/1583971200/1584057600

Sold for 10 keys

sale 4:

https://backpack.tf/profiles/76561198152017357#!/compare/1585353600/1585526400

https://backpack.tf/profiles/76561198277264564#!/compare/1585353600/1585440000

Sold for Atomic HFOHA + spell

HFOHA Mini:

https://backpack.tf/suggestion/5eaa181e115e0e081b2c24f7

Suggestion for 7.5 keys

Spell Mini:

https://backpack.tf/profiles/76561198218801107#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198109452231#!/compare/1585008000/1585094400

Sold for ~1.5 keys

https://backpack.tf/profiles/76561198109452231#!/compare/1585180800/1585267200

https://backpack.tf/profiles/76561198254861074#!/compare/1585180800/1585267200

Sold for KS Festive RL (~1.15 keys)

Taking ~1.3 as a mini.

Total is ~9 keys

https://bot.tf/stats/listings/MVQQK3X6

B/O of 9 keys

Sale 5:

https://backpack.tf/profiles/76561198277264564#!/compare/1585353600/1585440000

https://backpack.tf/profiles/76561198302562584#!/compare/1583625600/1585440000

Sold for N&B Polar + 2 keys

Polar Mini:

https://backpack.tf/suggestion/5ea9ebd85688ed18de25ce6a

Suggestion for 7.25 keys

Total is 9.25 keys

https://bot.tf/stats/listings/Y800PZ3W

B/O of 10 keys

sale 6:

https://backpack.tf/profiles/76561198134546405#!/compare/1580256000/1580342400

https://backpack.tf/profiles/76561198064065041#!/compare/1580169600/1580342400

https://backpack.tf/profiles/76561198061353482#!/compare/1580256000/1580342400

Untrace

Sale 7:

https://backpack.tf/profiles/76561198072898758#!/compare/1580428800/1581120000

https://backpack.tf/profiles/76561198084911409#!/compare/1580428800/1580515200

Untrace

sale 8:

https://backpack.tf/profiles/76561198084911409#!/compare/1580601600/1580688000

https://backpack.tf/profiles/76561198020673987#!/compare/1581897600/1588118400

Untrace

Sale 9:

https://backpack.tf/profiles/76561198020673987#!/compare/1581897600/1581984000

https://backpack.tf/profiles/76561198337734785#!/compare/1581811200/1581897600

QS

sale 10:

https://backpack.tf/profiles/76561198337734785#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198354459626#!/compare/1584230400/1584403200

Untrace

Sale 11:

https://backpack.tf/profiles/76561198088459414#!/compare/1582588800/1582675200

https://backpack.tf/profiles/76561198355089825#!/compare/1582502400/1582588800

https://backpack.tf/profiles/76561198886850124#!/compare/1582588800/1582675200

https://backpack.tf/profiles/76561198999667088#!/compare/1582761600/1582329600

https://backpack.tf/profiles/76561198886850124#!/compare/1582761600/1582675200

Untrace / bulk / tradeback

Sale 12:

https://backpack.tf/profiles/76561198305492646#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198163320618#!/compare/1580428800/1580515200

Keys?

Sale 13:

https://backpack.tf/profiles/76561198163320618#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198128940635#!/compare/1580428800/1580515200

Sold for C9 Trilby + 2 keys

Trilby Mini:

https://backpack.tf/suggestion/5ea9e635c12c6752d7161f08

Suggestion for 16.5 keys

Total is 18.5 keys

sale 14:

https://backpack.tf/profiles/76561198128940635#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198313704489#!/compare/1580428800/1580515200

Untrace (napper does not match)

Sale 15:

https://backpack.tf/profiles/76561198313704489#!/compare/1580428800/1580515200

https://backpack.tf/profiles/76561198965919122#!/compare/1580428800/1580515200

Sold for 8 keys

Sale 16:

https://backpack.tf/profiles/76561198965919122#!/compare/1581120000/1582243200

https://backpack.tf/profiles/76561198144692530#!/compare/1581120000/1581206400

Keys or Stormy Pom Pom, can't tell

Sale 17:

https://backpack.tf/profiles/76561198263599385#!/compare/1580774400/1580860800

https://backpack.tf/profiles/76561198077870175#!/compare/1580860800/1580947200

Sold for N&B Whoopee + 1 key

use there

https://bot.tf/stats/listings/4EE1NE2E

B/O of ~10 keys

Sale 18:

https://backpack.tf/profiles/76561198077870175#!/compare/1580860800/1580947200

https://backpack.tf/profiles/76561198244409420#!/compare/1580774400/1580860800

Bulky

sale 19:

https://backpack.tf/profiles/76561198244409420#!/compare/1580860800/1580947200

https://backpack.tf/profiles/76561198084976847#!/compare/1580860800/1580947200

Bulk

Sale 20:

https://backpack.tf/profiles/76561198146510790#!/compare/1585267200/1585353600

https://backpack.tf/profiles/76561198080179568#!/compare/1585353600/1585526400

QS

Sale 21:

https://marketplace.tf/items/tf2/30069;5;u56

$19.49 / $1.76 = 11.07 keys

$12.6 / $1.77 = 7.12 keys <---- https://backpack.tf/item/7956318419

$19.49 / $1.75 = 11.14 keys

Total sales @:

7, 8, 9, 9.5, 10, 11, 11, 18.5 keys

buyers up to ~7 keys,

https://i.imgur.com/kl8tG6E.jpg

month unsold for 9 keys,

2 month unsold for 11 keys,

calling 7 low,

18.5 high,

taking 8 - 11 keys, conserves close to unsolds.