https://marketplace.tf/items/tf2/523;5;u61

July 26 - $49.5 / $1.93 = 25.65 keys - sellers around 18 at the time https://bot.tf/stats/listings/429XE0PZ

July 30 - $49.5 / $1.92 = 25.78 keys - sellers around 25 at the time https://bot.tf/stats/listings/466L5EOL

Aug 5 - $49.5 / $1.90 = 26.05 keys - sellers around 23 at the time https://bot.tf/stats/listings/4J9O06VV

Aug 18 - $49.5 / $1.79 = 27.65 keys - sellers around 25 at the time https://bot.tf/stats/listings/MLVNZZ9G

Aug 26 - $49.5 / $1.84 = 26.90 keys - unknown buyout https://bot.tf/stats/listings/4662N32L

Sep 24 - $45 / $1.84 = 24.46 keys - unknown buyout https://bot.tf/stats/listings/MGL0VW63

Oct 16 - $45 / $1.88 = 23.94 keys - unknown buyout https://bot.tf/stats/listings/Y5OZD0V3

https://backpack.tf/item/7955598414

https://backpack.tf/item/7957132719

https://backpack.tf/item/2879009843

https://backpack.tf/item/2211420306

//

https://backpack.tf/profiles/76561198108062629#!/compare/1599609600/1600732800

https://backpack.tf/profiles/76561199043177646#!/compare/1599523200/1599609600

low quicksell to buy order

//

https://backpack.tf/profiles/76561199043177646#!/compare/1600646400/1600732800

https://backpack.tf/profiles/76561198101236452#!/compare/1600646400/1600732800

19 keys 1 scrap

//

https://backpack.tf/profiles/76561198005386323#!/compare/1598745600/1598832000

https://backpack.tf/profiles/76561198225796692#!/compare/1598745600/1598832000

Untraceable

//

https://backpack.tf/profiles/76561198225796692#!/compare/1598745600/1598832000

https://backpack.tf/profiles/76561198359095196#!/compare/1596585600/1598832000

18 keys, same day sale as the untraceable from above

//

https://backpack.tf/profiles/76561199029568303#!/compare/1598745600/1599177600

https://backpack.tf/profiles/76561198142603321#!/compare/1599091200/1599350400

Untraceable

//

https://backpack.tf/profiles/76561198142603321#!/compare/1600387200/1600646400

https://backpack.tf/profiles/76561198098121709#!/compare/1600041600/1600732800

Looks like 19 keys 20 refined, but histories don't match up

//

https://backpack.tf/profiles/76561198112281935#!/compare/1597190400/1597276800

https://backpack.tf/profiles/76561198150760829#!/compare/1592092800/1597276800

Untraceable

//

https://backpack.tf/profiles/76561198150760829#!/compare/1597363200/1597536000

https://backpack.tf/profiles/76561198080179568#!/compare/1597449600/1597536000

Untraceable

//

https://backpack.tf/profiles/76561198080179568#!/compare/1597968000/1598054400

https://backpack.tf/profiles/76561198024486517#!/compare/1598054400/1598140800

22 keys

//

https://backpack.tf/profiles/76561198024486517#!/compare/1598054400/1598140800

https://backpack.tf/profiles/76561199043177646#!/compare/1598054400/1598140800

Untraceable

//

Sales

18 - quicksell to bot

19 - unconfirmed, but looks like it

19 - pure

22

24

24

26

26

26

27

28

everything else is marketplace

https://gyazo.com/32632d9de212876acbf1174e3a204128

two sellers at 23 and 24 keys

going with 19-24 keys, sellers listed lower while those sold on marketplace so excluding so many high marketplace sales is justified