Several sellers at 70 and above, buyers at ~35 - 36 keys
9.5 and 160 seem to be clear outliers so excluding those. Sales at 39 are outdated as of making this suggestion, but excluding them entirely makes for a lopsided range. Electing to include the sale at 35 to compensate for that.
https://mannco.store/item/440-collectors-professional-killstreak-big-earner
$295/1.84 = 160.33 keys https://backpack.tf/item/2714637966 ? - seems high
https://backpack.tf/item/2261316013 - listed at $295
https://steamcommunity.com/market/listings/440/Collector%27s%20Specialized%20Killstreak%20Big%20Earner
Sep 24 2022, ~9.5 keys, low buy order
https://steamcommunity.com/market/listings/440/Collector%27s%20Professional%20Killstreak%20Big%20Earner
Sep 02 2022, ~39 keys (x2), slightly outdated
https://backpack.tf/item/2851547066
https://backpack.tf/profiles/76561198322883512#!/compare/1667433600/1667692800
https://backpack.tf/profiles/76561198044130442#!/compare/1667347200/1667692800
https://gyazo.com/30a378c364dcec02333f9d9d01e71ef8 (Credits Soju)
https://imgur.com/a/AqtQl0S
60 keys
https://backpack.tf/item/2493997201
https://backpack.tf/profiles/76561198257225844#!/compare/1666137600/1667779200
https://backpack.tf/profiles/76561198088822281#!/compare/1666137600/1666656000
https://scrap.tf/auctions/75CAO6
https://imgur.com/a/HWCyvTO (Credits Xdrei)
49 keys
https://backpack.tf/item/2992309760
https://backpack.tf/profiles/76561198047950170#!/compare/1667520000/1668038400
https://backpack.tf/profiles/76561198050582650#!/compare/1667606400/1667692800
Bulk
https://backpack.tf/item/3099492705
https://backpack.tf/profiles/76561198229872056#!/compare/1667779200/1668384000
https://backpack.tf/profiles/76561197966756586#!/compare/1668211200/1668384000
https://gladiator.tf/time-machine?item=Collector%27s%20Professional%20Killstreak%20Big%20Earner&at=2022-11-14T06:08:31.000Z
Bulk
https://backpack.tf/item/6121292286
https://backpack.tf/profiles/76561198050582650#!/compare/1667520000/1667606400
https://backpack.tf/profiles/76561198316831771#!/compare/1667520000/1667692800\
https://gladiator.tf/time-machine?item=Collector%27s%20Professional%20Killstreak%20Big%20Earner&at=2022-11-04T12:02:47.000Z
Seems to be ~35 key buy order
Sales:
9.5
35
3939
49
60
160
https://gyazo.com/bbf9328e89b053e532e8186c273268be
Several sellers at 70 and above, buyers at ~35 - 36 keys
9.5 and 160 seem to be clear outliers so excluding those. Sales at 39 are outdated as of making this suggestion, but excluding them entirely makes for a lopsided range. Electing to include the sale at 35 to compensate for that.
Taking 35 - 60 keys.