https://marketplace.tf/items/tf2/30542;5;u62

$99.99 / $2.14 = 46.72 keys

$99.99 / $2.19 = 45.66 keys

$105.99 / $2.18 = 48.62 keys

https://backpack.tf/item/7956440002

https://backpack.tf/profiles/76561198394370051#!/compare/1611273600/1617062400

https://backpack.tf/profiles/76561198888086377#!/compare/1616976000/1617062400

Untraceable

https://backpack.tf/profiles/76561198052029104#!/compare/1618617600/1618704000

https://backpack.tf/profiles/76561198873998676#!/compare/1618531200/1618617600

Untraceable

https://backpack.tf/profiles/76561198873998676#!/compare/1618531200/1618617600

https://backpack.tf/profiles/76561198132068284#!/compare/1618531200/1618617600

49 keys

https://backpack.tf/profiles/76561198132068284#!/compare/1618704000/1618790400

https://backpack.tf/profiles/76561198084463167#!/compare/1618704000/1618790400

Added 11 keys for Haunted Ghosts Blast Defense, better used there

https://backpack.tf/profiles/76561198084463167#!/compare/1618876800/1618963200

https://backpack.tf/profiles/76561199069472222#!/compare/1618876800/1618963200

Added 18 keys for Refragmenting Reality Hellmet

https://backpack.tf/profiles/76561198453530349#!/compare/1611532800/1611619200

https://backpack.tf/profiles/76561198356985023#!/compare/1611532800/1611619200

Untraceable

https://backpack.tf/profiles/76561198356985023#!/compare/1611619200/1611705600

https://backpack.tf/profiles/76561198888086377#!/compare/1611619200/1611705600

Untraceable

https://backpack.tf/profiles/76561198116002030#!/compare/1615939200/1616025600

https://backpack.tf/profiles/76561198139370347#!/compare/1615939200/1616025600

Untraceable

https://backpack.tf/profiles/76561198255799196#!/compare/1617840000/1617926400

https://backpack.tf/profiles/76561198053466638#!/compare/1617753600/1617840000

45 keys

https://backpack.tf/profiles/76561198053466638#!/compare/1618099200/1618185600

https://backpack.tf/profiles/76561198338658661#!/compare/1617840000/1618185600

Blizzardy Storm Ze Goggles

Purple Energy Waxy Wayfinder

3 keys

https://gladiator.tf/listings/6072237ed74659a269240091 54 key buyout

https://backpack.tf/profiles/76561198179707937#!/compare/1613692800/1613779200

https://backpack.tf/profiles/76561199128182851#!/compare/1613606400/1614038400

42 keys + 36.66 refined

https://backpack.tf/profiles/76561199128182851#!/compare/1616284800/1616371200

https://backpack.tf/profiles/76561198074105298#!/compare/1615852800/1616371200

46 keys

https://backpack.tf/profiles/76561198057282204#!/compare/1611619200/1618358400

https://backpack.tf/profiles/76561198183978843#!/compare/1618272000/1618358400

52 keys

https://backpack.tf/profiles/76561198183978843#!/compare/1618358400/1618617600

https://backpack.tf/profiles/76561198453530349#!/compare/1618358400/1618617600

Untraceable, but went to a buyer after 52 key sale

Dupes https://backpack.tf/item/3319980110

Sales:

43

45

46

46

47

49

49

52, likely quicksold after

https://gyazo.com/cceffa2900bb96858d63eedd639d6a18

Buyers to 46.5

Let's go with 47-49, 46-49 could work too but there is a lot of buyers, a whole page not like 1 or 2