Item 1: https://backpack.tf/item/16109016176

Sale 1:

https://backpack.tf/profiles/76561199564942025#!/compare/1766793600/1766880000

https://backpack.tf/profiles/76561198227046928#!/compare/1766880000/1767225600

Sold alongside 34.33 ref for 17 keys

With keys having a median value of 57.94 ref, that makes the ref 0.59 keys. 17-0.59=16.41 keys, rounding to 16 keys

Item 2: https://backpack.tf/item/15232612081

Sale 2:

https://backpack.tf/profiles/76561198278721648#!/compare/1765670400/1765843200

https://backpack.tf/profiles/76561199192607141#!/compare/1765584000/1765670400

Dumped to a bot, 16 ref matches. Was most likely 16 keys 16 ref https://gladiator.tf/sales?item=Lost%20Signal%20Taunt:%20The%20Fist%20Bump&at=2026-02-27T22:28:21.449Z

Sale 3:

Bot owner listed it on Mannco.Store and sold it there, unusable

Item 3: https://backpack.tf/item/11334017114

Sale 4:

https://marketplace.tf/items/tf2/31162;5;u3200

Sold for $39.99 on Jan 17 2026

Keys were $1.82 https://marketplace.tf/items/tf2/5021;6

39.99/1.82=21.97 ~22 keys

Sales:

16, (16?), 22

Sellers:

BPTF - https://imgur.com/LHIxc0b 25 keys (5 months)

MPTF - https://marketplace.tf/items/tf2/31162;5;u3200 none

STN - https://stntrading.eu/item/tf2/Unusual+Lost+Signal+Taunt%3A+The+Fist+Bump none

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20The%20Fist%20Bump?filter=Lost+Signal https://imgur.com/cqTCMAD none

Going with 16-22 keys