Item 1:

https://backpack.tf/item/3912220435

The beginning of the history looks like a lot of gambling; starting with the first actual sale

Sale 1:

Sold for 175 Keys

https://backpack.tf/item/13913210767 (Key ID: "13982430274")

https://backpack.tf/profiles/76561199177132803#!/compare/1703808000/1703894400

https://backpack.tf/profiles/76561198183165447#!/compare/1703808000/1703894400

Sale 2:

Bulk/Traceable

https://backpack.tf/profiles/76561198183165447#!/compare/1704758400/1704844800

https://backpack.tf/profiles/76561198040965652#!/compare/1704758400/1704844800

Sale 3:

Sold for Aurora Borealis Taunt: Fresh Brewed Victory + Shrieking Shades Shellmet + North Star Hat Outta Hell

https://backpack.tf/profiles/76561198040965652#!/compare/1704758400/1704844800

https://backpack.tf/profiles/76561197970262340#!/compare/1704758400/1704844800

Sale 4:

Untraceable

https://backpack.tf/profiles/76561197970262340#!/compare/1707177600/1707350400

https://backpack.tf/profiles/76561198125791160#!/compare/1707264000/1707350400

Sale 5:

Sold for North Star Nuke + Strange Aces High Anger - Better used for Nuke

https://backpack.tf/profiles/76561198125791160#!/compare/1707696000/1707782400

https://backpack.tf/profiles/76561198143864870#!/compare/1707696000/1707782400

//

Item 2:

https://backpack.tf/item/2318479162

Sale 6:

Sold for 150 Keys (Unusual ID: "14106975721")

https://backpack.tf/profiles/76561198049447942#!/compare/1706486400/1706572800

https://backpack.tf/profiles/76561198085556501#!/compare/1706400000/1706572800

Sale 7:

Sold for 180 Keys (Unusual ID: "14108201923")

https://backpack.tf/profiles/76561198085556501#!/compare/1706400000/1706572800

https://backpack.tf/profiles/76561199548630124#!/compare/1706486400/1706572800

Sale 8:

Untraceable/Bulk

https://backpack.tf/profiles/76561199548630124#!/compare/1706832000/1706918400

https://backpack.tf/profiles/76561199026390261#!/compare/1706832000/1706918400

Sale 9:

Sold for ~152 Keys (Buyer's Compare)

https://backpack.tf/profiles/76561199026390261#!/compare/1706832000/1706918400

https://backpack.tf/profiles/76561198165205268#!/compare/1703635200/1707004800

Sale 10:

Sold with 25 Keys for a Frostbite Crocleather Slouch Better used for Crocleather Slouch

https://backpack.tf/profiles/76561198165205268#!/compare/1707004800/1707177600

https://backpack.tf/profiles/76561198211647572#!/compare/1706918400/1707004800

//

Item 2:

https://backpack.tf/item/1611099845

Sale 11:

75 Keys traceable

https://backpack.tf/profiles/76561198810018122#!/compare/1706140800/1706227200

https://backpack.tf/profiles/76561198085556501#!/compare/1706140800/1706227200

Sale 12:

Sold with 70 Keys for an Anti-Freeze Virus Doctor - Better used for Virus Doctor

https://backpack.tf/profiles/76561198085556501#!/compare/1706313600/1706400000

https://backpack.tf/profiles/76561198197215790#!/compare/1706313600/1706400000

//

Item 3 + 4 + 5 + 6:

https://backpack.tf/item/1341623995 - No sale; Duped history

https://backpack.tf/item/1125663997 - No sale; Duped history

https://backpack.tf/item/883614497 - No sale; Duped history

https://backpack.tf/item/523822248 - Listed on Marketplace

//

Marketplace sales:

https://marketplace.tf/items/tf2/451;5;u35;strange

https://marketplace.tf/items/tf2/451;5;u35

https://marketplace.tf/items/tf2/5021;6

Sale 13[/b]

[u]Sale 14:

$359.99/$1.67 = ~216 Keys (Dec 22)

Sale :

https://backpack.tf/item/647171212

$375/$1.69 = ~222 Keys (Jan 9)

//

Total Sales

150, 152, 175, 180, 184, 216, 222

https://imgur.com/a/47eGWax

https://backpack.tf/item/523822248 - Unsold @ $300 (300/1.71 = ~175 Keys)

Taking 150 - 175 Keys