Credits to Xergoyf and Shuffle Spy: https://backpack.tf/suggestion/61aed22df5dbe814c8469359#comment-61ede7814ad186282713adc2

https://backpack.tf/profiles/76561199102407070#!/compare/1642032000/1642118400

https://backpack.tf/profiles/76561199105783188#!/compare/1642032000/1642118400

https://gladiator.tf/sales?item=Strange%20Circling%20Heart%20Private%20Eye&at=2022-01-23T23:23:01.708Z

Likely sold for 21

27 is technically untraceable, looks like it sold to a private inventory. I might be misunderstanding the history but I think the private profile is the one who dumped to Hmm the 2nd time (22 sale)

I would go 20 - 24 here, buyers have dropped to ~17 so nothing is countered.

https://backpack.tf/profiles/76561198099685235#!/compare/1642032000/1642118400 - Sold for 14 Keys + a double-spelled Gibus + small items

https://backpack.tf/profiles/76561198099685235#!/compare/1642118400/1642291200 - The Gibus sold for 8 Keys

I can't tell what mad bought the Private Eye for, but the seller had a buyout of 21 Keys - https://i.imgur.com/X6KzYFA.png

22 - 27 would work in the absence of evidence to support the 21 Key sale.

Going with 22-27 as I presume Shuffle Spy was referring to Xergoyf's comment in post.

https://backpack.tf/item/288446717 - dupe but everything else is old

https://backpack.tf/profiles/76561198119601623#!/compare/1631923200/1632009600

bulk for molten mallard ballcap

https://backpack.tf/profiles/76561198073595373#!/compare/1628208000/1632096000

untrace

https://backpack.tf/profiles/76561198047615621#!/compare/1632182400/1632268800

https://backpack.tf/profiles/76561198211670637#!/compare/1632182400/1632268800

9k + pool party (~4k, https://gladiator.tf/listings/614ab8e9250867ea292914b1) + 2 TODs (~1k) + Special Snowfall Killing Tree (8-11k, https://gladiator.tf/sales?item=Special%20Snowfall%20Killing%20Tree&at=2021-10-07T03:04:20.638Z) = 23.5, round up to 24k

(no cap i think: https://gladiator.tf/listings/614a7c66d11639ed9c6c0ee6)

https://backpack.tf/profiles/76561198211670637#!/compare/1632268800/1632355200

https://backpack.tf/profiles/76561199102407070#!/compare/1632268800/1632355200

~20k buy order

https://backpack.tf/profiles/76561199102407070#!/compare/1632441600/1632528000

https://gladiator.tf/sales?item=Strange%20Circling%20Heart%20Private%20Eye&at=2021-09-26T03:09:49.137Z

this looks like this also could have been ~24k

https://backpack.tf/profiles/76561198047859113#!/compare/1632700800/1632787200

27k

https://backpack.tf/profiles/76561197978481117#!/compare/1638403200/1638662400

https://backpack.tf/profiles/76561199102407070#!/compare/1638576000/1638662400

untrace

I imagine the current seller at 24 https://backpack.tf/item/288446717

bought for an untrace ~22k buy order https://gladiator.tf/sales?item=Strange%20Circling%20Heart%20Private%20Eye&at=2021-12-07T03:01:16.473Z

bought like a week ish ago https://gladiator.tf/sales?item=Strange%20Circling%20Heart%20Private%20Eye&at=2021-11-29T03:01:16.473Z

so including 27 for now.

22-27 as suggested by Shuffle Spy.