Sale 1:

https://backpack.tf/profiles/76561198337734785#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198444820092#!/compare/1581984000/1582243200

Sold for ~12 keys

sale 2:

https://backpack.tf/profiles/76561198444820092#!/compare/1582416000/1582588800

https://backpack.tf/profiles/76561198131081286#!/compare/1582502400/1582588800

Sold for Vivid Crack + ~3 keys

use there

https://bot.tf/stats/listings/4EEJ3RDQ

B/O of 13 keys

Sale 3:

https://backpack.tf/profiles/76561198131081286#!/compare/1583020800/1583107200

https://backpack.tf/profiles/76561198072998203#!/compare/1583020800/1583107200

Sold for ~12 keys

sale 4:

https://backpack.tf/profiles/76561198072998203#!/compare/1584057600/1584144000

https://backpack.tf/profiles/76561198090147535#!/compare/1584057600/1584144000

Bulk

sale 5:

https://backpack.tf/profiles/76561198090147535#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561199017926833#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561198037674114#!/compare/1585094400/1583884800

https://backpack.tf/profiles/76561198020673987#!/compare/1584921600/1585180800

https://backpack.tf/profiles/76561198850274253#!/compare/1586908800/1586995200

Untrace / bulk

sale 6:

https://backpack.tf/profiles/76561198850274253#!/compare/1588204800/1588291200

https://backpack.tf/profiles/76561199044780296#!/compare/1588204800/1588291200

Sold for ~10 keys

sale 7:

https://backpack.tf/profiles/76561199044780296#!/compare/1588291200/1588377600

https://backpack.tf/profiles/76561198205612720#!/compare/1588291200/1588377600

Sold for 11 keys

sale 8:

https://backpack.tf/profiles/76561198205612720#!/compare/1588723200/1588809600

https://backpack.tf/profiles/76561198093136976#!/compare/1588550400/1588723200

Sold for 9 keys

sale 9:

https://backpack.tf/profiles/76561198093136976#!/compare/1588550400/1588723200

https://backpack.tf/profiles/76561198800306994#!/compare/1588723200/1588809600

Sold for ~11 keys

sale 10:

https://backpack.tf/profiles/76561198800306994#!/compare/1588723200/1588809600

https://backpack.tf/profiles/76561198135869440#!/compare/1588377600/1588723200

Sold for ~11 keys

sale 11:

https://backpack.tf/profiles/76561198135869440#!/compare/1588723200/1588896000

https://backpack.tf/profiles/76561198987674719#!/compare/1588896000/1588982400

Sold for ~9.5 keys

sale 12:

https://backpack.tf/profiles/76561198987674719#!/compare/1588982400/1589068800

https://backpack.tf/profiles/76561198146784656#!/compare/1588896000/1588982400

Can trace ~3 keys

sale 13:

https://backpack.tf/profiles/76561198146784656#!/compare/1588982400/1589068800

https://backpack.tf/profiles/76561198123206882#!/compare/1587945600/1589155200

Can trace 2 keys

sale 14:

https://backpack.tf/profiles/76561198305494036#!/compare/1584576000/1584662400

https://backpack.tf/profiles/76561198281046061#!/compare/1584576000/1584662400

Sold for 10 keys

sale 15:

https://backpack.tf/profiles/76561198281046061#!/compare/1584662400/1584921600

https://backpack.tf/profiles/76561198114471773#!/compare/1582588800/1585008000

Untrace

sale 16:

https://backpack.tf/profiles/76561198114471773#!/compare/1585008000/1585094400

https://backpack.tf/profiles/76561198196410274#!/compare/1584921600/1585008000

Sold for CPS Shutter + 2 keys

use there

sale 17:

https://backpack.tf/profiles/76561198196410274#!/compare/1584921600/1585008000

https://backpack.tf/profiles/76561198516017657#!/compare/1584921600/1585008000

Bulk

Sale 18:

https://backpack.tf/profiles/76561198516017657#!/compare/1585008000/1585785600

https://backpack.tf/profiles/76561198841279602#!/compare/1585008000/1585094400

QS

sale 19:

https://backpack.tf/profiles/76561198841279602#!/compare/1588118400/1588291200

https://backpack.tf/profiles/76561198109650171#!/compare/1588377600/1588464000

https://backpack.tf/profiles/76561198416846223#!/compare/1586995200/1588809600

Untrace

Sale 20:

https://backpack.tf/profiles/76561198128453265#!/compare/1588550400/1588896000

https://backpack.tf/profiles/76561198206831569#!/compare/1588636800/1588723200

Bulk

sale 21:

https://backpack.tf/profiles/76561198206831569#!/compare/1588809600/1588896000

https://backpack.tf/profiles/76561198057816579#!/compare/1588723200/1588809600

Sold with ~0.5 keys in sweets for 8 keys

Total is ~7.5 keys

sale 22:

https://backpack.tf/profiles/76561198057816579#!/compare/1588809600/1588896000

https://backpack.tf/profiles/76561198078978802#!/compare/1588809600/1588896000

Untrace

sale 23:

https://backpack.tf/profiles/76561198798964113#!/compare/1585008000/1585353600

https://backpack.tf/profiles/76561198110617485#!/compare/1584835200/1585353600

Bulk

sale 24:

https://marketplace.tf/items/tf2/30316;5;u18

$15.5 / $1.68 = 9.23 keys

https://backpack.tf/item/4003007165

Total sales @:

7.5, 9, 9, 9.5, 10, 10, 11, 11, 11, 12, 12 keys

buyers up to ~10.27 keys,

seller at 12 keys, aging,

seller at 13 keys poorly bumped, aging.

https://i.imgur.com/ZC44zot.jpg

given amount of sales ~10 keys,

taking 10 - 12 keys.