Item 1: https://backpack.tf/item/6970212565

Sale 1:

https://backpack.tf/profiles/76561199581722058#!/compare/1767225600/1767312000

https://backpack.tf/profiles/76561198166314775#!/compare/1767225600/1767312000

9 keys 1 scrap, ~9 keys

Sale 2:

https://backpack.tf/profiles/76561198166314775#!/compare/1767312000/1767398400

https://backpack.tf/profiles/76561199099031605#!/compare/1767312000/1767398400

Dumped to a bot, Gladiator.tf indicates this was 9 keys 2 ref https://gladiator.tf/sales?item=Static%20Shock%20Taunt:%20The%20Victory%20Lap

Sale 3:

https://backpack.tf/profiles/76561199099031605#!/compare/1770163200/1770249600

https://backpack.tf/profiles/76561198284933025#!/compare/1770163200/1770249600

13 keys match in the buyer's compare, however Gladiator.tf indicates this was was 14 keys https://gladiator.tf/sales?item=Static%20Shock%20Taunt:%20The%20Victory%20Lap

Taking 13 since the last key can't be traced

Sale 4:

https://backpack.tf/profiles/76561198284933025#!/compare/1770940800/1771027200

https://backpack.tf/profiles/76561199043177646#!/compare/1770940800/1771027200

Dumped to a bot for 9 keys 5 ref, ~9 keys

Sale 5:

https://backpack.tf/profiles/76561199043177646#!/compare/1771459200/1771545600

https://backpack.tf/profiles/76561198085327188#!/compare/1771545600/1771632000

12 keys

Sales:

9 (x3), 12, 13

Sellers:

BPTF - https://imgur.com/vSpoq46 none

MPTF - https://marketplace.tf/items/tf2/1172;5;u3044 $27.4 (~15 keys)

STN - https://stntrading.eu/item/tf2/Unusual+Static+Shock+Taunt%3A+The+Victory+Lap none, buy order at ~9 keys

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20The%20Victory%20Lap?filter=Static+Shock https://imgur.com/jDRekXF 69.99€ (~36 keys)

13 got dumped for less so that sale shouldn't be used. 9 is probably a bit low given STN's buy order, however we can't ignore the fact that there are 3 sales at that value vs 1 sale at 12.

Going with 9-12 keys