Item 1: https://backpack.tf/item/10752658649

Sale 1:

Excluding the Mannco.Store sale (and also the purchase from STN just before since there's no way to know who bought it)

Sale 2:

https://backpack.tf/profiles/76561198424663112#!/compare/1768867200/1770940800

https://backpack.tf/profiles/76561198311498888#!/compare/1768780800/1768867200

Untrace/STN dump

Sale 3:

https://backpack.tf/profiles/76561198311498888#!/compare/1769817600/1769904000

https://backpack.tf/profiles/76561198108384535#!/compare/1769817600/1769904000

3 keys, buyer listed it on MPTF

MPTF: https://marketplace.tf/items/tf2/1182;5;u3070

Sale 4: Sold for $7.49 on Feb 12 2026

Keys were $1.87 https://marketplace.tf/items/tf2/5021;6

7.49/1.87=4.01 ~4 keys

Sales:

3, 4

Sellers:

BPTF - https://imgur.com/40Xrpte none, MP sellers don't have pure buyouts

MPTF - https://marketplace.tf/items/tf2/1182;5;u3070 $7.49 (~4 keys)

STN - https://stntrading.eu/item/tf2/Unusual+Aurora+Borealis+Taunt%3A+Yeti+Punch none

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Yeti%20Punch?filter=Aurora+Borealis https://imgur.com/mTOJdMk starting from 11,81€ (~6.1 keys)

Going with 3-4 keys