Sale 1:

https://backpack.tf/profiles/76561198386195044#!/compare/1537574400/1588636800

https://backpack.tf/profiles/76561198305494036#!/compare/1588550400/1588636800

QS

sale 2:

https://backpack.tf/profiles/76561198305494036#!/compare/1588636800/1588723200

https://backpack.tf/profiles/76561198100484031#!/compare/1588291200/1588723200

Untrace

sale 3:

https://backpack.tf/profiles/76561198100484031#!/compare/1590624000/1590796800

https://backpack.tf/profiles/76561198305494036#!/compare/1590624000/1590710400

QS

sale 4:

https://backpack.tf/profiles/76561198305494036#!/compare/1590624000/1590710400

https://backpack.tf/profiles/76561198148983233#!/compare/1590624000/1590710400

Sold for 28 keys

sale 5:

https://backpack.tf/profiles/76561198148983233#!/compare/1590710400/1590796800

https://backpack.tf/profiles/76561198360353776#!/compare/1590624000/1590796800

sold for 29 keys

sale 6:

https://backpack.tf/profiles/76561198360353776#!/compare/1590883200/1591142400

https://backpack.tf/profiles/76561198850274253#!/compare/1590796800/1590883200

QS for ~29 keys

sale 7:

https://backpack.tf/profiles/76561198850274253#!/compare/1591315200/1591401600

https://backpack.tf/profiles/76561198275222296#!/compare/1591315200/1591401600

Sold for keys

sale 8:

https://backpack.tf/profiles/76561198080179568#!/compare/1584921600/1585008000

https://backpack.tf/profiles/76561198095480894#!/compare/1584921600/1585094400

Sold for ~25 keys(?)

Sale 9:

https://backpack.tf/profiles/76561198095480894#!/compare/1586649600/1586736000

https://backpack.tf/profiles/76561198143872789#!/compare/1579132800/1586736000

Sold for 30 keys

sale 10:

https://backpack.tf/profiles/76561198359982620#!/compare/1591920000/1592006400

https://backpack.tf/profiles/76561198113971364#!/compare/1592006400/1592092800

Sold for Vortex Vizier

use there

sale 11:

https://backpack.tf/profiles/76561198259986634#!/compare/1586217600/1586304000

https://backpack.tf/profiles/76561198348395086#!/compare/1585612800/1586476800

Sold for 32 keys

sale 12:

https://backpack.tf/profiles/76561198348395086#!/compare/1586476800/1586908800

https://backpack.tf/profiles/76561198337734785#!/compare/1586476800/1586908800

QS

sale 13:

https://backpack.tf/profiles/76561198337734785#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198122445210#!/compare/1587513600/1587686400

Untrace

sale 14:

https://backpack.tf/profiles/76561198122445210#!/compare/1587513600/1587686400

https://backpack.tf/profiles/76561198081042493#!/compare/1587600000/1587686400

Sold for 35 keys

sale 15:

https://backpack.tf/profiles/76561198081042493#!/compare/1588636800/1588723200

https://backpack.tf/profiles/76561198100836666#!/compare/1588550400/1588723200

Sold for 32 keys (could use a double count)

Sale 16:

https://backpack.tf/profiles/76561198444508082#!/compare/1587686400/1587772800

https://backpack.tf/profiles/76561198993238861#!/compare/1586476800/1588032000

Bulk

sale 17:

https://backpack.tf/profiles/76561198993238861#!/compare/1588204800/1590278400

https://backpack.tf/profiles/76561198073335093#!/compare/1589328000/1589673600

Bulky

sale 18:

https://backpack.tf/profiles/76561198073335093#!/compare/1589932800/1590278400

https://backpack.tf/profiles/76561198065106212#!/compare/1590278400/1590364800

Sold for GE Hedge(26.5) + 6 keys

Total is 32.5 keys

https://bot.tf/stats/listings/4ZPEN0DD

B/O of 30 keys, capping

sale 19:

https://backpack.tf/profiles/76561198065106212#!/compare/1590624000/1590883200

https://backpack.tf/profiles/76561198156315732#!/compare/1590710400/1590796800

Sold with ~4 keys in sweets for Beams Burglerre

use there

sale 20:

https://marketplace.tf/items/tf2/108;5;u9

$49.99 / $1.68 = 29.76 keys

$49.99 / $1.77 = 28.24 keys

Total sales @:

25, 28, 28, 29, 29, 30, 30, 30, 32, 32, 35 keys

buyers up to ~28.65 keys,

given sales at around 29,

taking 29 - 32 keys.