https://backpack.tf/item/11012893938 Sold on Mannco.store then listed on Marketplace.tf for $11.99 https://marketplace.tf/items/tf2/30614;5;u3073

https://backpack.tf/item/11098003358

Untrace:

https://backpack.tf/profiles/76561199477561214#!/compare/1700265600/1700352000

https://backpack.tf/profiles/76561199014888234#!/compare/1700179200/1700352000

2 keys 42 ref match in seller's compare:

https://backpack.tf/profiles/76561199014888234#!/compare/1701734400/1701820800

https://backpack.tf/profiles/76561198086688141#!/compare/1701820800/1701907200

keys were around 59.33-59.44 ref at the time of the suggestion (using 59.39 as a mid-point) https://backpack.tf/suggestion/657612e26a5a8fd7fc0671e0

After doing the math, this sale is 2.71 keys, rounding to 2.7 (42/59.39=0.71, 2+0.71=2.71)

https://backpack.tf/item/11121733248

Untrace, most likely bought then instantly dumped:

https://backpack.tf/profiles/76561198311498888#!/compare/1702252800/1702339200

https://backpack.tf/profiles/76561198316831771#!/compare/1702252800/1702339200

3 keys, seller added 53 ref :

https://backpack.tf/profiles/76561198316831771#!/compare/1704931200/1705017600

https://backpack.tf/profiles/76561198158357292#!/compare/1704931200/1705017600

Keys were around 63.22-63.33 ref (using 63.28 as a mid-point) https://backpack.tf/suggestion/659eff87c6a7b20c6d0143c6

After doing the math, the ref part equals to ~0.84 keys (53/63.28=~0.84)

3-0.84=2.16 keys, rounding to 2.15