Team 3 - Suggestion 5, made by aj

Item 1

https://backpack.tf/item/8177972269

Sale 1

MP

Item 2

https://backpack.tf/item/7271476767

Sale 2

https://backpack.tf/profiles/76561198088636158#!/compare/1706054400/1706140800

https://backpack.tf/profiles/76561198453530349#!/compare/1706054400/1706140800

4 keys match

Sale 3

https://backpack.tf/profiles/76561198453530349#!/compare/1708992000/1709078400

https://backpack.tf/profiles/76561199043177646#!/compare/1708992000/1709078400

Untrace

Sale 4

https://backpack.tf/profiles/76561199043177646#!/compare/1708992000/1709078400

https://backpack.tf/profiles/76561199026390261#!/compare/1708992000/1709078400

26 ref matches

Item 3

https://backpack.tf/item/6519375274

Sale 5

MP

Sale 6

https://backpack.tf/profiles/76561199017959799#!/compare/1708819200/1708905600

https://backpack.tf/profiles/76561198364779784#!/compare/1708732800/1708905600

https://backpack.tf/profiles/76561198364779784#!/compare/1708732800/1708905600

https://backpack.tf/profiles/76561199017959799#!/compare/1708819200/1708905600

https://backpack.tf/profiles/76561199017959799#!/compare/1708905600/1708992000

https://backpack.tf/profiles/76561198061353482#!/compare/1708905600/1708992000

https://backpack.tf/profiles/76561198061353482#!/compare/1708905600/1708992000

https://backpack.tf/profiles/76561199017959799#!/compare/1708992000/1708905600

https://backpack.tf/profiles/76561199017959799#!/compare/1708992000/1709078400

https://backpack.tf/profiles/76561198310750043#!/compare/1708992000/1709078400

https://backpack.tf/profiles/76561198310750043#!/compare/1709078400/1709164800

https://backpack.tf/profiles/76561199073346188#!/compare/1709078400/1709164800

https://backpack.tf/profiles/76561199073346188#!/compare/1709078400/1709164800

https://backpack.tf/profiles/76561199208323450#!/compare/1709078400/1709164800

https://backpack.tf/profiles/76561199208323450#!/compare/1709078400/1709164800

https://backpack.tf/profiles/76561198983856237#!/compare/1709078400/1709164800

Gambling

Item 4

https://backpack.tf/item/6465546345

Sale 7

https://backpack.tf/profiles/76561198817148683#!/compare/1705622400/1709683200

https://backpack.tf/profiles/76561199017959799#!/compare/1707264000/1711584000

https://backpack.tf/profiles/76561199017959799#!/compare/1708732800/1708819200

https://backpack.tf/profiles/76561198398638928#!/compare/1708732800/1708819200

https://backpack.tf/profiles/76561198398638928#!/compare/1708905600/1708992000

https://backpack.tf/profiles/76561199017959799#!/compare/1708905600/1708819200

https://backpack.tf/profiles/76561199017959799#!/compare/1708992000/1709078400

https://backpack.tf/profiles/76561198056287785#!/compare/1708560000/1709337600

Gambling

Marketplace sales

https://marketplace.tf/items/tf2/30920;5;u3027

Jan 28th - $10.87 / $1.7 = 6.39 keys

Feb 25th - 2x $10.47 / $1.7 = 6.16 keys

Sales

4, 6.5, 6

Current Listings

https://stntrading.eu/item/tf2/Unusual+Eerie+Lightning+Taunt%3A+The+Bunnyhopper

https://prnt.sc/P5201COL70-U - STN has one up for 5 keys 20.33 ref, about 5.5 keys

https://marketplace.tf/items/tf2/30920;5;u3027

https://backpack.tf/item/6593444536

$16.05 / $1.67 = 9.61 keys on MP

I reckon 4 - 6.5 keys is fine, midpoint is 5.25 keys so the range is fine?