Sale 1:

https://backpack.tf/profiles/76561198059718665#!/compare/1582156800/1582243200

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

Bulk

sale 2:

https://backpack.tf/profiles/76561198516017657#!/compare/1586822400/1586995200

https://backpack.tf/profiles/76561198106110004#!/compare/1586736000/1586822400

Sold for 28 keys

sale 3:

https://backpack.tf/profiles/76561198106110004#!/compare/1588809600/1589587200

https://backpack.tf/profiles/76561198008931439#!/compare/1582934400/1589500800

Untrace

sale 4:

https://backpack.tf/profiles/76561198057897812#!/compare/1587859200/1587945600

https://backpack.tf/profiles/76561198125534438#!/compare/1587772800/1587859200

Sold for 27 keys

sale 5:

https://backpack.tf/profiles/76561198125534438#!/compare/1587859200/1588032000

https://backpack.tf/profiles/76561198343428818#!/compare/1587859200/1587945600

Untrace

sale 6:

https://backpack.tf/profiles/76561198343428818#!/compare/1588118400/1588809600

https://backpack.tf/profiles/76561198054642670#!/compare/1588636800/1588809600

Bulk

sale 7:

https://backpack.tf/profiles/76561198393027444#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198305494036#!/compare/1583971200/1584057600

QS

sale 8:

https://backpack.tf/profiles/76561198305494036#!/compare/1583971200/1584057600

https://backpack.tf/profiles/76561198185241815#!/compare/1583971200/1584057600

Sold for keys

sale 9:

https://backpack.tf/profiles/76561198185241815#!/compare/1584057600/1584144000

https://backpack.tf/profiles/76561198197935990#!/compare/1584057600/1584144000

Bulk

sale 10:

https://backpack.tf/profiles/76561198197935990#!/compare/1584144000/1584230400

https://backpack.tf/profiles/76561198220098345#!/compare/1584144000/1584230400

Bulk

Sale 11:

https://marketplace.tf/items/tf2/30977;5;u30

$55 / $1.72 = 31.98 keys

$64.99 / $1.69 = 38.46 keys <-- https://backpack.tf/item/6745789171

$64.99 / $1.82 = 35.71 keys <-- https://backpack.tf/item/8097269899 | https://bot.tf/stats/listings/4KVR0KZE B/O of 35 keys, capping

$69.99 / $1.89 = 37.03 keys <-- https://backpack.tf/item/6829514851| https://bot.tf/stats/listings/Y5ZNX9J5 B/O of 35 keys, capping

Total sales @:

27, 28, 32, 35, 35, 38 keys

buyers up to ~27 keys,

seller at 32 keys, dropped from 34 recently:

https://bot.tf/stats/listings/429WR92Q

taking 28 - 35 keys