K1ng:

Range is kinda wide. Sales are all over the place but 11-13 sounds about right with what you have here.

https://marketplace.tf/items/tf2/30921;5;u3072

$49.99/1.86=~27k

$49.99/1.83=~27k

(new ones listed at same price)

https://backpack.tf/item/10756723362

https://backpack.tf/item/10821552861

https://backpack.tf/item/10859839017

https://backpack.tf/profiles/76561198930899269#!/compare/1636502400/1636675200

https://backpack.tf/profiles/76561198143663361#!/compare/1636416000/1636761600

https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Runner%27s%20Rhythm

untrace SCM sale, perhaps around ~5-8k

https://backpack.tf/item/10821552861

https://backpack.tf/profiles/76561198070159917#!/compare/1636416000/1636848000

https://backpack.tf/profiles/76561198850274253#!/compare/1636588800/1636675200

s. lady killer w/ BPFP + stuff matches on seller's, Runner + DBD tossle matches on buyer's, probably bulk

https://backpack.tf/profiles/76561198850274253#!/compare/1636675200/1636761600

https://backpack.tf/profiles/76561199104872642#!/compare/1636588800/1636848000

https://gladiator.tf/listings/618f34334fb8470d83066d60

5k matches

https://backpack.tf/profiles/76561199104872642#!/compare/1638403200/1638489600

https://backpack.tf/profiles/76561199111073161#!/compare/1638403200/1638489600

bulk

QS.store movement

https://backpack.tf/profiles/76561199084784906#!/compare/1640736000/1640822400

https://backpack.tf/profiles/76561198091502579#!/compare/1640736000/1640908800

https://gladiator.tf/listings/61cdb571b007afb6131c7678

56k matches, so I presume this sold for ~11k B/O

https://backpack.tf/item/10752017250

https://backpack.tf/profiles/76561199111073161#!/compare/1636329600/1636416000

https://backpack.tf/profiles/76561199104872642#!/compare/1636329600/1636416000

~13k matches, kinda unclear tho

https://backpack.tf/profiles/76561199104872642#!/compare/1636588800/1636848000

https://backpack.tf/profiles/76561198850274253#!/compare/1636588800/1636675200

so the same user bought two of these, at the same time? I dunno

https://backpack.tf/profiles/76561198850274253#!/compare/1636675200/1636761600

https://backpack.tf/profiles/76561198091502579#!/compare/1636675200/1636761600

https://gladiator.tf/listings/618f34334fb8470d83066d60

maybe the 12k listing is actually referring to this one, 12k matches here at least

https://backpack.tf/item/10756723362

https://backpack.tf/profiles/76561198081907770#!/compare/1636070400/1637193600

https://backpack.tf/profiles/76561199111354228#!/compare/1635811200/1636243200

https://gladiator.tf/listings?item=Aurora%20Polaris%20Taunt:%20Runner%27s%20Rhythm

most likely ~7k buy order

https://backpack.tf/profiles/76561199111354228#!/compare/1636329600/1636416000

https://backpack.tf/profiles/76561198091502579#!/compare/1636329600/1636416000

moved from bot

https://backpack.tf/item/10750974092

https://backpack.tf/profiles/76561198059480365#!/compare/1642550400/1642636800

https://backpack.tf/profiles/76561198376885782#!/compare/1642550400/1642636800

looks bulk

https://backpack.tf/item/10440256039

https://backpack.tf/profiles/76561199199418911#!/compare/1635897600/1635984000

https://backpack.tf/profiles/76561198083478388#!/compare/1635897600/1635984000

https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Runner%27s%20Rhythm

SCM, ~5-6k most likely, low

https://backpack.tf/item/9163454487

https://backpack.tf/profiles/76561198131195941#!/compare/1635984000/1636243200

https://backpack.tf/profiles/76561199084784906#!/compare/1636156800/1636243200

untrace

https://backpack.tf/profiles/76561199084784906#!/compare/1636156800/1636243200

https://backpack.tf/profiles/76561198090457223#!/compare/1636156800/1636243200

https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Runner%27s%20Rhythm

was prob. bought on QS.store before being dumped on SCM for ~5k

https://backpack.tf/profiles/76561198090457223#!/compare/1640908800/1640995200

https://backpack.tf/profiles/76561198159470037#!/compare/1640908800/1640995200

bulk for sunbeams fire fighter

https://backpack.tf/profiles/76561198159470037#!/compare/1641081600/1641168000

https://backpack.tf/profiles/76561198384122857#!/compare/1641081600/1641168000

https://gladiator.tf/listings/61d1d75af6a6ff23a81cf47b

12k + bunch of skins (let's say ~1k https://steamcommunity.com/market/listings/440/Spirit%20of%20Halloween%20Tomislav%20%28Factory%20New%29

https://steamcommunity.com/market/listings/440/Spirit%20of%20Halloween%20Stickybomb%20Launcher%20%28Factory%20New%29 https://steamcommunity.com/market/listings/440/Spirit%20of%20Halloween%20Grenade%20Launcher%20%28Factory%20New%29) = 13k

https://backpack.tf/profiles/76561198384122857#!/compare/1641254400/1641427200

https://backpack.tf/profiles/76561198029534325#!/compare/1641168000/1641340800

looks like they added for Aurora Australis Taunt: Runner's Rhythm, use there

https://backpack.tf/profiles/76561198029534325#!/compare/1642118400/1642291200

https://backpack.tf/profiles/76561198850121720#!/compare/1642204800/1642291200

~7k, dump

https://backpack.tf/profiles/76561198850121720#!/compare/1642377600/1642464000

https://backpack.tf/profiles/76561198091502579#!/compare/1642377600/1642464000

https://gladiator.tf/listings/61e6264fba15afcf21c7fbd0

lots of keys match, I assume this sold for 11k B/O

https://backpack.tf/item/7324382952

https://backpack.tf/profiles/76561199106931116#!/compare/1641081600/1641168000

https://backpack.tf/profiles/76561198049474526#!/compare/1641081600/1641168000

https://gladiator.tf/sales?item=Aurora%20Polaris%20Taunt:%20Runner%27s%20Rhythm&at=2022-01-28T21:34:44.726Z

Aurora Borealis Taunt: Runner's Rhythm matches, doesn't really look like 20k as listed

Sales:

5 and other low SCM sales, 7, 7?, 11, 11, 12, 13, 13?, 27, 27

https://gladiator.tf/listings/61f45929303d57f68ef67db1

Sales at 27 seem much higher than the rest, buyers at 4.45-8.35k, the seller at 16 is young but unsold. 11-13 as K1ng suggested.