Sale 1:

https://backpack.tf/profiles/76561198125162923#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198821294885#!/compare/1582070400/1582156800

Bulk

sale 2:

https://backpack.tf/profiles/76561198821294885#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198314211872#!/compare/1582156800/1582243200

Sold for 11 keys (QS)

sale 3:

https://backpack.tf/profiles/76561198314211872#!/compare/1587340800/1587427200

https://backpack.tf/profiles/76561198044157063#!/compare/1587081600/1587427200

Sold for 16 keys

sale 4:

https://backpack.tf/profiles/76561198044157063#!/compare/1587772800/1587859200

https://backpack.tf/profiles/76561198089821201#!/compare/1587686400/1587772800

Bulk

sale 5:

https://backpack.tf/profiles/76561197981954308#!/compare/1580688000/1580860800

https://backpack.tf/profiles/76561198163320618#!/compare/1580774400/1580860800

Sold for C9 Trilby + 2 keys

use there

https://bot.tf/stats/listings/Y9G2N83W

B/O of 17 keys

sale 6:

https://backpack.tf/profiles/76561198163320618#!/compare/1580947200/1581033600

https://backpack.tf/profiles/76561198309394654#!/compare/1581033600/1581379200

Sold with ~0.49 keys in sweets for Insomnnia Airdog

use there

https://bot.tf/stats/listings/4W6G1PK0

B/O of 16 keys

sale 7:

https://backpack.tf/profiles/76561198309394654#!/compare/1582675200/1583366400

https://backpack.tf/profiles/76561198119937114#!/compare/1583280000/1583366400

Untrace

sale 8:

https://backpack.tf/profiles/76561198119937114#!/compare/1583366400/1583452800

https://backpack.tf/profiles/76561198037674114#!/compare/1583107200/1583884800

Bulk

sale 9:

https://backpack.tf/profiles/76561198996799157#!/compare/1582502400/1582588800

https://backpack.tf/profiles/76561198313292803#!/compare/1582416000/1582502400

untrace, probably keys?

sale 10:

https://backpack.tf/profiles/76561198313292803#!/compare/1585094400/1585180800

https://backpack.tf/profiles/76561198869901325#!/compare/1585008000/1585180800

Sold for 14 keys

sale 11:

https://backpack.tf/profiles/76561198869901325#!/compare/1585353600/1585440000

https://backpack.tf/profiles/76561198268110229#!/compare/1585353600/1585440000

Sold for 15 keys

sale 12:

https://backpack.tf/profiles/76561198268110229#!/compare/1585699200/1585785600

https://backpack.tf/profiles/76561198358296372#!/compare/1585699200/1585785600

QS

sale 13:

https://backpack.tf/profiles/76561198358296372#!/compare/1585872000/1585958400

https://backpack.tf/profiles/76561198384054671#!/compare/1585699200/1585958400

Sold for 14 keys

sale 14:

https://backpack.tf/profiles/76561198384054671#!/compare/1585699200/1585958400

https://backpack.tf/profiles/76561198313292803#!/compare/1585872000/1585958400

QS

sale 15:

https://backpack.tf/profiles/76561198313292803#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198983492424#!/compare/1586736000/1586908800

Sold for ~14 keys

Sale 16:

https://marketplace.tf/items/tf2/167;5;u3017

$38.5 / $1.81 = 21.27 keys

Total sales @:

11, 14, 14, 14, 15, 16, 21 keys

buyers up to 10 keys,

seller at 15 keys, aging:

https://i.imgur.com/i7bC4oj.jpg

calling 11 low,

21 high,

taking 14 - 16 keys.