https://marketplace.tf/items/tf2/406;14;kt-2

https://backpack.tf/item/4052060072

$100 / $1.84 = 54.35 keys

https://marketplace.tf/items/tf2/406;14;kt-3

https://backpack.tf/item/5532819631

https://backpack.tf/item/2275460333

$79.99 / $1.81 = 44.19 keys

$79.99 / $1.81 = 44.19 keys

https://backpack.tf/profiles/76561198090409013#!/compare/1629763200/1630022400

https://backpack.tf/profiles/76561198160856661#!/compare/1629936000/1630022400

bulk

https://backpack.tf/profiles/76561198049595224#!/compare/1623801600/1630800000

https://backpack.tf/profiles/76561198115721685#!/compare/1630713600/1630800000

https://backpack.tf/profiles/76561198115721685#!/compare/1632614400/1632700800

bulk untraceable

https://backpack.tf/profiles/76561199111073161#!/compare/1626652800/1626739200

https://backpack.tf/profiles/76561198199489167#!/compare/1626652800/1626739200

39 keys

https://steamcommunity.com/market/listings/440/Collector%27s%20Splendid%20Screen

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Splendid%20Screen

["Sep 21 2021 17: +0",152.03,"1"]= 70 keys

https://steamcommunity.com/market/listings/440/Collector%27s%20Professional%20Killstreak%20Splendid%20Screen

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Professional%20Killstreak%20Splendid%20Screen

["Jul 04 2021 01: +0",88.758,"1"] = 38 keys

["Jul 26 2021 01: +0",76.945,"1"] = 33 keys

["Aug 11 2021 01: +0",94.997,"1"] = 42 keys

["Sep 27 2021 16: +0",97.859,"1"] = 48 keys

https://steamcommunity.com/market/listings/440/Collector%27s%20Specialized%20Killstreak%20Splendid%20Screen

https://steamcommunity.com/market/pricehistory/?country=US&currency=1&appid=440&market_hash_name=Collector%27s%20Specialized%20Killstreak%20Splendid%20Screen

$22.78, low

Sales:

33

38

39

42

44

44

48

54

with this range of sales, neither side really looks like an outlier

going with 38-48, cutting off the semi extended ends to tighten the range