Item 1: https://backpack.tf/item/15966957592

Sale 1: Mannco.Store, excluding

Item 2: https://backpack.tf/item/15133351410

Withdrawn from Mannco.Store

MPTF: https://marketplace.tf/items/tf2/31236;5;u3200

Item 3: https://backpack.tf/item/13646148349

Sale 2:

Sold for $8 on December 4 2025

Keys were $1.8 https://marketplace.tf/items/tf2/5021;6

8/1.8=4.44 ~4.45 keys

Sale 3:

Sold for $7.5 on December 21 2025

Keys were $1.83

7.5/1.83=4.1 keys

Sale 4:

Sold for $7.5 on December 26 2025

Keys were $1.89

7.5/1.89=3.97 ~3.95 keys

Sales:

3.95, 4.1, 4.45

Sellers:

BPTF - https://imgur.com/vYgm8OP none

MPTF - https://marketplace.tf/items/tf2/31236;5;u3200 none

STN - https://stntrading.eu/item/tf2/Unusual+Lost+Signal+Taunt%3A+Doctor%27s+Defibrillators none

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Doctor%27s%20Defibrillators?filter=Lost+Signal https://imgur.com/GBWRrlN none

Going with 3.95-4.45 keys