Sale 1:

https://backpack.tf/profiles/76561198055622215#!/compare/1582156800/1582243200

https://backpack.tf/profiles/76561198272832232#!/compare/1582156800/1582243200

Sold for CH Shutter + 2 keys

https://bot.tf/stats/listings/4KRK875N

B/O of 18 keys

sale 2:

https://backpack.tf/profiles/76561198272832232#!/compare/1582329600/1582675200

https://backpack.tf/profiles/76561198420097719#!/compare/1582243200/1582761600

Sold for 10 keys (used to buy Highway)

Sale 3:

https://backpack.tf/profiles/76561198337734785#!/compare/1584230400/1584316800

https://backpack.tf/profiles/76561198136810646#!/compare/1584144000/1584316800

Keys

sale 4:

https://backpack.tf/profiles/76561198136810646#!/compare/1584144000/1584316800

https://backpack.tf/profiles/76561198115097414#!/compare/1583193600/1584316800

Untrace

sale 5:

https://backpack.tf/profiles/76561198115097414#!/compare/1584316800/1584403200

https://backpack.tf/profiles/76561198020673987#!/compare/1584748800/1584835200

Bulk

Sale 6:

https://backpack.tf/profiles/76561198128699734#!/compare/1585785600/1586304000

https://backpack.tf/profiles/76561198150077063#!/compare/1585785600/1586304000

SCM

Sale 7:

https://backpack.tf/profiles/76561198150077063#!/compare/1586908800/1586995200

https://backpack.tf/profiles/76561198099141522#!/compare/1586649600/1586995200

Bulk QS

sale 8:

https://backpack.tf/profiles/76561198099141522#!/compare/1586649600/1586995200

https://backpack.tf/profiles/76561198130429617#!/compare/1586908800/1586995200

Bulk QS

sale 9:

https://backpack.tf/profiles/76561198130429617#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198173442901#!/compare/1586995200/1587081600

Bulk

sale 10:

https://backpack.tf/profiles/76561198173442901#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198305494036#!/compare/1587081600/1587168000

Sold for 10 keys (QS?)

Sale 11:

https://backpack.tf/profiles/76561198305494036#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198160856661#!/compare/1587081600/1587168000

Sold for ~9.5 keys (note this was directly after Sale 10)

Sale 12:

https://backpack.tf/profiles/76561198062153114#!/compare/1586995200/1587081600

https://backpack.tf/profiles/76561198101300189#!/compare/1586908800/1587081600

https://backpack.tf/profiles/76561198179253523#!/compare/1586995200/1587081600

Bulk / untrace / Gambling

sale 13:

https://backpack.tf/profiles/76561197994144284#!/compare/1586044800/1586304000

https://backpack.tf/profiles/76561198972294135#!/compare/1586390400/1586476800

https://backpack.tf/profiles/76561198080179568#!/compare/1586476800/1586563200

Untrace then SCM

sale 14:

https://backpack.tf/profiles/76561198080179568#!/compare/1587081600/1587168000

https://backpack.tf/profiles/76561198195897055#!/compare/1587168000/1587340800

sold for ~16 keys

Sale 15:

https://backpack.tf/profiles/76561198195897055#!/compare/1587168000/1587340800

https://backpack.tf/profiles/76561198305494036#!/compare/1587340800/1587427200

QS a day after Sale 14

Sale 16:

https://backpack.tf/profiles/76561198254049895#!/compare/1582070400/1582243200

https://backpack.tf/profiles/76561199000645463#!/compare/1582070400/1582156800

Sold for Miami Rag(8.5) + ~2.5 keys in sweets

Total is ~11 keys

Sale 17:

https://backpack.tf/profiles/76561199000645463#!/compare/1582070400/1582156800

https://backpack.tf/profiles/76561198152710449#!/compare/1582070400/1582156800

Sold for C9 Tartan + negligible sweets

sale 18, 19:

https://marketplace.tf/items/tf2/30658;5;u57

$22 / $1.68 = 13.10 keys

$25 / $1.79 = 13.97 keys

Sale 20:

https://backpack.tf/profiles/76561198850274253#!/compare/1587600000/1587686400

https://backpack.tf/profiles/76561198125908828#!/compare/1587427200/1587686400

Sold for keys

Total sales @:

9.5, 10, 10, 11, 13, 14, 16 keys

buyers up to ~8.5 keys,

one high buyer up to ~10 keys,

taking 10 - 14 keys, note that 16 resold for lower.