Marketplace Sales:

https://marketplace.tf/items/tf2/31157;5;u3001

Couldn't find either history

$6.49, Feb 26th & April 18th

https://marketplace.tf/items/tf2/5021;6 - keys were:

$1.88, Feb 26th

$1.98, April 18th

6.49/1.88 = 3.452, rounds to 3.45 keys

6.49/1.98 = 3.278, rounds to 3.3 keys

Other movements:

https://gladiator.tf/sales?item=Showstopper%20Taunt:%20Scorcher%27s%20Solo&at=2026-05-08T14:15:41.575Z - labelled as 3 keys + 25 ref

https://backpack.tf/profiles/76561198149388672#!/compare/1769472000/1770940800

Buyer and history untraceable

https://backpack.tf/item/10455253688 - mannco

Sellers:

https://i.imgur.com/id1wJif.png

https://backpack.tf/item/9723560567 - ~4.55 keys

https://backpack.tf/item/10062596821 - $6.49 (~3.25 keys)

https://backpack.tf/item/9672019720 - $6.49

https://backpack.tf/item/10222333259 - $6.49

https://backpack.tf/item/9714504289 - $6.49

https://backpack.tf/item/12412793200 - $6.49

https://backpack.tf/item/10026167542 - $6.49

https://backpack.tf/item/15786302922 - $9.29

https://backpack.tf/item/9916024445 - $11.99

Sales at:

3.3

3.45

The marketplace sellers barely end up at ~3.25 keys, should be fine to just use 3.3 as the low-end.

Taking 3.3-3.45 keys